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154 results on '"Hegarty, S. P."'

2. Sports stars: analyzing the performance of astronomers at visualization-based discovery

Author

Fluke, C. J., Parrington, L., Hegarty, S., MacMahon, C., Morgan, S., Hassan, A. H., and Kilborn, V. A.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

In this data-rich era of astronomy, there is a growing reliance on automated techniques to discover new knowledge. The role of the astronomer may change from being a discoverer to being a confirmer. But what do astronomers actually look at when they distinguish between "sources" and "noise?" What are the differences between novice and expert astronomers when it comes to visual-based discovery? Can we identify elite talent or coach astronomers to maximize their potential for discovery? By looking to the field of sports performance analysis, we consider an established, domain-wide approach, where the expertise of the viewer (i.e. a member of the coaching team) plays a crucial role in identifying and determining the subtle features of gameplay that provide a winning advantage. As an initial case study, we investigate whether the SportsCode performance analysis software can be used to understand and document how an experienced HI astronomer makes discoveries in spectral data cubes. We find that the process of timeline-based coding can be applied to spectral cube data by mapping spectral channels to frames within a movie. SportsCode provides a range of easy to use methods for annotation, including feature-based codes and labels, text annotations associated with codes, and image-based drawing. The outputs, including instance movies that are uniquely associated with coded events, provide the basis for a training program or team-based analysis that could be used in unison with discipline specific analysis software. In this coordinated approach to visualization and analysis, SportsCode can act as a visual notebook, recording the insight and decisions in partnership with established analysis methods. Alternatively, in situ annotation and coding of features would be a valuable addition to existing and future visualisation and analysis packages., Comment: 16 pages, 7 figures; accepted for publication in PASP Special Issue: Techniques and Methods for Astrophysical Data Visualization

Published
2017
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3. The Australian Square Kilometre Array Pathfinder: Performance of the Boolardy Engineering Test Array

Author

McConnell, D., Allison, J. R., Bannister, K., Bell, M. E., Bignall, H. E., Chippendale, A. P., Edwards, P. G., Harvey-Smith, L., Hegarty, S., Heywood, I., Hotan, A. W., Indermuehle, B. T., Lenc, E., Marvil, J., Popping, A., Raja, W., Reynolds, J. E., Sault, R. J., Serra, P., Voronkov, M. A., Whiting, M., Amy, S. W., Axtens, P., Ball, L., Bateman, T. J., Bock, D. C. -J., Bolton, R., Brodrick, D., Brothers, M., Brown, A. J., Bunton, J. D., Cheng, W., Cornwell, T., DeBoer, D., Feain, I., Gough, R., Gupta, N., Guzman, J. C., Hampson, G. A., Hay, S., Hayman, D. B., Hoyle, S., Humphreys, B., Jacka, C., Jackson, C. A., Jackson, S., Jeganathan, K., Joseph, J., Koribalski, B. S., Leach, M., Lensson, E. S., MacLeod, A., Mackay, S., Marquarding, M., McClure-Griffiths, N. M., Mirtschin, P., Mitchell, D., Neuhold, S., Ng, A., Norris, R., Pearce, S., Qiao, R. Y., Schinckel, A. E. T., Shields, M., Shimwell, T. W., Storey, M., Troup, E., Turner, B., Tuthill, J., Tzioumis, A., Wark, R. M., Westmeier, T., Wilson, C., and Wilson, T.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We describe the performance of the Boolardy Engineering Test Array (BETA), the prototype for the Australian Square Kilometre Array Pathfinder telescope ASKAP. BETA is the first aperture synthesis radio telescope to use phased array feed technology, giving it the ability to electronically form up to nine dual-polarization beams. We report the methods developed for forming and measuring the beams, and the adaptations that have been made to the traditional calibration and imaging procedures in order to allow BETA to function as a multi-beam aperture synthesis telescope. We describe the commissioning of the instrument and present details of BETA's performance: sensitivity, beam characteristics, polarimetric properties and image quality. We summarise the astronomical science that it has produced and draw lessons from operating BETA that will be relevant to the commissioning and operation of the final ASKAP telescope., Comment: Accepted for publication in PASA

Published
2016
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4. Timing jitter in passively mode-locked semiconductor lasers

Author

Pimenov, A., Habruseva, T., Rachinskii, D., Hegarty, S. P., Huyet, G., and Vladimirov, A. G.

Subjects
Physics - Optics, Mathematics - Dynamical Systems, 37N20, 65P30, 78A60
Abstract

We study the effect of noise on the dynamics of passively mode-locked semiconductor lasers both experimentally and theoretically. A method combining analytical and numerical approaches for estimation of pulse timing jitter is proposed. We investigate how the presence of dynamical features such as wavelength bistability affects timing jitter., Comment: 12 pages, 6 figures

Published
2014
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5. Antiphase dynamics in a multimode semiconductor laser with optical injection

Author

Osborne, S., Amann, A., Buckley, K., Ryan, G., Hegarty, S. P., Huyet, G., and O'Brien, S.

Subjects
Physics - Optics
Abstract

A detailed experimental study of antiphase dynamics in a two-mode semiconductor laser with optical injection is presented. The device is a specially designed Fabry-Perot laser that supports two primary modes with a THz frequency spacing. Injection in one of the primary modes of the device leads to a rich variety of single and two-mode dynamical scenarios, which are reproduced with remarkable accuracy by a four dimensional rate equation model. Numerical bifurcation analysis reveals the importance of torus bifurcations in mediating transitions to antiphase dynamics and of saddle-node of limit cycle bifurcations in switching of the dynamics between single and two-mode regimes., Comment: 7 pages, 9 figures

Published
2008
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9. Classification of variants of reduced penetrance in high-penetrance cancer susceptibility genes: Framework for genetics clinicians and clinical scientists by CanVIG-UK (Cancer Variant Interpretation Group-UK)

Author

Garrett, Alice, Allen, Sophie, Durkie, Miranda, Burghel, George J., Robinson, Rachel, Callaway, Alison, Field, Joanne, Frugtniet, Bethan, Palmer-Smith, Sheila, Grant, Jonathan, Pagan, Judith, McDevitt, Trudi, Rowlands, Charlie F., McVeigh, Terri, Hanson, Helen, Turnbull, Clare, Turnbull, C., Garrett, A., Loong, L., Choi, S., Torr, B., Allen, S., Durkie, M., Callaway, A., Drummond, J., Burghel, G.J., Robinson, R., Berry, I.R., Wallace, A.J., Eccles, D.M., Tischkowitz, M., Ellard, S., Hanson, H., Baple, E., Evans, D.G., Woodward, E., Lalloo, F., Samant, S., Lucassen, A., Znaczko, A., Shaw, A., Ansari, A., Kumar, A., Donaldson, A., Murray, A., Ross, A., Taylor-Beadling, A., Taylor, A., Innes, A., Brady, A., Kulkarni, A., Hogg, A.C., Bowden, A. Ramsay, Hadonou, A., Coad, B., McIldowie, B., Speight, B., DeSouza, B., Mullaney, B., McKenna, C., Brewer, C., Olimpio, C., Clabby, C., Crosby, C., Jenkins, C., Armstrong, C., Bowles, C., Brooks, C., Byrne, C., Maurer, C., Baralle, D., Chubb, D., Stobo, D., Moore, D., O'Sullivan, D., Donnelly, D., Randhawa, D., Halliday, D., Atkinson, E., Rauter, E., Johnston, E., Maher, E., Sofianopoulou, E., Petrides, E., McRonald, F., Pelz, F., Frayling, I., Corbett, G., Rea, G., Clouston, H., Powell, H., Williamson, H., Carley, H., Thomas, H.J.W., Tomlinson, I., Cook, J., Hoyle, J., Tellez, J., Whitworth, J., Williams, J., Murray, J., Campbell, J., Tolmie, J., Field, J., Mason, J., Burn, J., Bruty, J., Callaway, J., Grant, J., Del Rey Jimenez, J., Pagan, J., VanCampen, J., Barwell, J., Monahan, K., Tatton-Brown, K., Ong, K.R., Murphy, K., Andrews, K., Mokretar, K., Cadoo, K., Smith, K., Baker, K., Brown, K., Reay, K., McKay Bounford, K., Bradshaw, K., Russell, K., Stone, K., Snape, K., Crookes, L., Reed, L., Taggart, L., Yarram, L., Cobbold, L., Walker, L., Walker, L., Hawkes, L., Busby, L., Izatt, L., Kiely, L., Hughes, L., Side, L., Sarkies, L., Greenhalgh, K.-L., Shanmugasundaram, M., Duff, M., Bartlett, M., Watson, M., Owens, M., Bradford, M., Huxley, M., Slean, M., Ryten, M., Smith, M., Ahmed, M., Roberts, N., O'Brien, C., Middleton, O., Tarpey, P., Logan, P., Dean, P., May, P., Brace, P., Tredwell, R., Harrison, R., Hart, R., Kirk, R., Martin, R., Nyanhete, R., Wright, R., Martin, R., Davidson, R., Cleaver, R., Talukdar, S., Butler, S., Sampson, J., Ribeiro, S., Dell, S., Mackenzie, S., Hegarty, S., Albaba, S., McKee, S., Palmer-Smith, S., Heggarty, S., MacParland, S., Greville-Heygate, S., Daniels, S., Prapa, S., Abbs, S., Tennant, S., Hardy, S., MacMahon, S., McVeigh, T., Foo, T., Bedenham, T., Cranston, T., McDevitt, T., Clowes, V., Tripathi, V., McConnell, V., Woodwaer, N., Wallis, Y., Kemp, Z., Mullan, G., Pierson, L., Rainey, L., Joyce, C., Timbs, A., Reuther, A.-M., Frugtniet, B., DeSouza, B., Husher, C., Lawn, C., Corbett, C., Nocera-Jijon, D., Reay, D., Cross, E., Ryan, F., Lindsay, H., Oliver, J., Dring, J., Spiers, J., Harper, J., Ciucias, K., Connolly, L., Tsang, M., Brown, R., Shepherd, S., Begum, S., Daniels, S., Tadiso, T., Linton-Willoughby, T., Heppell, H., Sahan, K., Worrillow, L., Allen, Z., Watt, C., Hegarty, M., Mitchell, R., Coles, R., Nickless, G., Cojocaru, E., Doal, I., Sava, F., McCarthy, C., Jeeneea, R., Goudie, D., McConachie, M., Botosneanu, S., Kavanaugh, G., Russell, K., Sherlaw, C., Tsoulaki, O., Forde, C., Petley, E., Jones, A.-B., Oprych, K., Pryde, S., Hyder, Z., Elkhateeb, N., Braham, R., Hanington, L., Huntley, C., Irving, R., Sadan, A., Ramos, M., Elliot, C., Wren, D., Lobo, D., McLean, J., May, D., Kearney, L., Campbell, T., Asakura, K., Alwadi, L., O’Shea, R., Gabriel, J., Chiecchio, L., Bowman, P., Sutton, L.A., Walsh, C., Cloke, V., Ucanok, D., Davies, J., Pleasance, B., Maguire, E., Whaite, A., Best, S., Westbury, S., Logan, A., Navarajasegaran, D., Bench, A., Wightman, P., Cartwright, A., Higgs, E., J.Bott, Whitehouse, H., Stevens, J., Martin, D., Dunlop, J., Thomas, S., Sau, C., Farndon, S., Coleman, N., Angelini, P., Duff, M., Massey, H., Rowlands, C., Garcia-Petit, C., Gillespie, K., Alder, A., Middleton, E., Cassidy, C., Orfali, N., Webb, A., Luharia, A., Walker, N., Charlton, J., Andreou, A., Peddie, J., Khan, M., Wilkinson, L., Bezuidenhout, H., Edis, M., Callard, A., Ostrowski, P., Moverley, P., Bean, K., Dunne, A., Moleirinho, A., Waller, S., Cox, K., Greensmith, L., Brittle, A., Gossan, N., Freestone, L., Shak, C., Langford, T., Clinch, Y., Livesey, H., Borland, S., Joshi, A., Wall, K., Whitworth, A., Wilsdon, A., Edgerley, K., Pugh, S., Chrysochoidi, N., Mutch, S., McMullan, C., Johnston, Y., Muraru, M., May, A., Begum, R., Smith, C., Patel, R., Bhatnagar, I., Taylor, A., Brown, D., Willan, J., Taylor, S., Jones, K., Cox, K., Ramsden, C., Taiwo, O., Jaudzemaite, J., Sharmin, R., Young, L., O’Dubhshlaine, C., McSorley, L., Rodriguez, I. Abreu, Lillis, S., Alexopoulos, P., Mortensson, E., Kingham, L., Moore, R., Kosicka-Slawinska, M., Aslam, S., Wells, R., Carter, A., Warren, H., Rolf, E., Reed, H., Pearce, L., Lock, D., Ali, F., Kolozi, A., White, N., Wood, D., and Hayden, C.

Abstract

Current practice is to report and manage likely pathogenic/pathogenic variants in a given cancer susceptibility gene as though having equivalent penetrance, despite increasing evidence of intervariant variability in risk associations. Using existing variant interpretation approaches, largely based on full-penetrance models, variants in which reduced penetrance is suspected may be classified inconsistently and/or as variants of uncertain significance. We aimed to develop a national consensus approach for such variants within the Cancer Variant Interpretation Group UK (CanVIG-UK) multidisciplinary network.

Published
2025
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11. Irish society of gastroenterology: Proceedings of Winter Meeting held Friday 21st and Saturday 22nd November, 1997

Author

Clarke, G., Ryan, E., O’Keane, J. C., Crowe, J., McMathuna, P., Moriarty, D., Ettarh, R., Sheahan, K., Hyland, J., O’Donoghue, D. P., Baird, A. W., Clarke, G., Ryan, E., Gormley, G., Keane, J. C. O., Crowe, J., MacMathuna, P., Wang, J. H., Wu, Q. D., Redmond, H. P., Condron, C., Bouchier-Hayes, D., Nally, K., Newton, F., O’Connell, J., O’Sullivan, G. C., Morgan, J., Collins, J. K., Shanahan, F., Goode, C., O’Connell, J., O’Sullivan, G. C., Collins, J. K., Shanahan, F., Winter, D. C., Taylor, C. T., Skelly, M. M., O’Donoghue, D. P., O’Sullivan, G. C., Baird, A. W., Harvey, B. J., Varghese, J. C., Farrell, M. A., McGrath, F. P., Murray, F. E., Osborne, H., Lee, M. J., Ryan, E., Sullivan, A., O’Keane, J. C., Crowe, J., Ryan, A. E., O’Keane, J. C., Crowe, J., Donovan, A. N., McCormick, P. A., Kenny, B., Somers, S., Bohan, A., Gibney, R. G., Marcaccio, M., Malone, D. E., Doyle, M., Delaney, C. P., Gorey, T. F., McEntee, G. P., O’Sullivan, G. C., Clarke, A., Stuart, R., Kelly, J., Kiely, M. D., Collins, J. K., Shanahan, F., O’Sullivan, M., Lovett, E., Mahmud, N., Kelleher, D., O’Morain, C. A., Larkin, C. J., Watson, R. G. P., Sloan, J. M., Ardill, J. E. S., Johnston, C. F., Buchanan, K. D., Heaney, A., Collins, J. S. A., Watson, G. R. P., Kalin, R. M., Heaney, A., Collins, J. S. A., Tham, T. C. K., Watson, R. G. P., McFarland, R. J., Bamford, K. B., Cróinín, T. Ó, Clyne, M., Drumm, B., Rowland, M., Kumar, D., O’Connor, P., Daly, L. E., Drumm, B., O’Toole, D. L., Long, A., Murphy, A. M., O’Neill, L., Weir, D. G., Kelleher, D., Heaney, A., Collins, J. S. A., Watson, R. G. P., Hopkins, A. M., Moynagh, P., O’Donoghue, D. P., Baird, A. W., Brennan, C., Harmey, J., Stapleton, P. P., Redmond, H. P., Bouchier-Hayes, D., Rasheed, A. M., Chen, G., Kelly, C., Bouchier-Hayes, D. J., Leahy, A., Gallagher, M., Grace, A., Xin, Y., Leader, M., Kay, E., Whelan, A., Pattison, U., Willoughby, R., Wallace, E., Weir, D., Feighery, C., Bennett, M. W., O’Connell, J., O’Sullivan, G. C., Brady, C., Roche, D., Collins, J. K., Shanahan, F., Mahmud, N., Molloy, A., McPartlin, J., Scott, J. M., Weir, D. G., Acheson, A. G., Lee, J., Khosraviani, K., Irwin, S. T., McDaid, J., McCormick, P. A., Docherty, J. R., O’Grady, A., Kay, E., Mabruk, M., Grace, A., Leader, M., Lee, J., Acheson, A. G., Irwin, S. T., Larkin, C. J., Johnston, C., Curry, W., Ardill, J., Cunningham, R., Buchanan, K. D., Watson, R. G. P., McDougall, N. I., Coyle, P. V., Callender, M. E., Ouinn, A. M., Warner, R., Stevens, F. M., Chakravarthi, P. I. S., Kearns, M., Bourke, M., Hassan, A., McWeeney, J., Stevens, F. M., McCarthy, C. F., Casey, M., O’Donoghue, J., Eustace-Ryan, A. M., O’Regan, P., Feighery, L., Jackson, J., Cronin, N., Shanahan, F., Quane, K., Feighery, C., Mulligan, E. D., Purcell, T., Dunne, B., Griffin, M., Noonan, N., Hollywood, D., Keeling, N., Reynolds, J. V., Hennessy, T. P. J., Mulligan, E. D., Purcell, T., Dunne, B., Griffin, M., Noonan, N., Hollywood, D., Keeling, N., Reynolds, J. V., Hennessy, T. P. J., Mulligan, E. D., Purcell, T., Dunne, B., Griffin, M., Noonan, N., Hollywood, D., Keeling, N., Reynolds, J. V., Hennessy, T. P. J., Mulligan, E. D., Purcell, T., Dunne, B., Griffin, M., Noonan, N., Hollywood, D., Keeling, N., Reynolds, J. V., Hennessy, T. P. J., O’Sulhvan, M., Harman, I., Breslin, N. P., Clayton, N., O’Morain, C. A., Hogan, S., Donovan, B., Hayes, D., Kiely, M., Eustace-Ryan, A. M., O’Regan, P., Goulding, C. A., Albloushi, S. S., O’Connor, J., Courtney, M. G., Murray, F. E., Albloushi, S. S., Goulding, C. A., Kay, E., Royston, D., Leader, M., Courtney, M. G., Murray, F. E., Albloushi, S. S., Kay, E., Goulding, C. A., Grace, A., O’Connor, J., Shattock, A. G., Courtney, M. G., Murray, F. E., Albloushi, S. S., Stack, A., Kay, E., Goulding, C. A., Carmody, M., Murray, F. E., Courtney, M. G., Barrett, S., Ryan, E., O’Keane, J. C., Crowe, J., Hennigan, A., Delaney, C. P., Young, L., Shields, C. J., O’Keane, C., Gorey, T. F., Fitzpatrick, J. M., Rasheed, A. M., Wang, J. H., Kelly, C., Bouchier-Hayes, D. J., Leahy, A., Doyle, M. M., Stephens, R. B., Daly, P. A., Bennett, M. W., O’Connell, J., O’Sullivan, G. C., Brady, C., Roche, D., Collins, J. K., Shanahan, F., Briggs, G. M., McCrory, D., Briggs, G. M., McCrory, D., O’Neill, S., O’Grady, H., Grant, D. C., Barry, K., Traynor, O., Hyland, J. M. P., O’Toole, G. C., Grant, D. C., Barry, M. K., Hyland, J. M. P., Johnston, S. D., Ritchie, C. M., Robinson, T. J., Johnston, S. D., Kirby, J. M., Mackle, E. M., Robinson, T. J., Haider, N., Aherne, N., McNichol, F., Hamilton, D., Neary, P., Hegarty, S., Connor, J. O., Watson, R. G. K., Drudy, D., Alwan, A., Fenelon, L., O’Farrelly, C., Hyland, J., Byrne, B., Madrigal, L., Carton, J., Collins, C., O’Donoghue, D., O’Farrelly, C., Gannon, N., Hickey, A., O’Boyle, C. A., Byrne, R., Albloushi, S., and Murray, F.

Published
1998
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13. Quantifying prediction of pathogenicity for within-codon concordance (PM5) using 7541 functional classifications of BRCA1and MSH2missense variants

Author

Loong, Lucy, Cubuk, Cankut, Choi, Subin, Allen, Sophie, Torr, Beth, Garrett, Alice, Loveday, Chey, Durkie, Miranda, Callaway, Alison, Burghel, George J., Drummond, James, Robinson, Rachel, Berry, Ian R., Wallace, Andrew, Eccles, Diana M., Tischkowitz, Marc, Ellard, Sian, Ware, James S., Hanson, Helen, Turnbull, Clare, Samant, S., Lucassen, A., Znaczko, A., Shaw, A., Ansari, A., Kumar, A., Donaldson, A., Murray, A., Ross, A., Taylor-Beadling, A., Taylor, A., Innes, A., Brady, A., Kulkarni, A., Hogg, A.-C., Bowden, A. Ramsay, Hadonou, A., Coad, B., McIldowie, B., Speight, B., DeSouza, B., Mullaney, B., McKenna, C., Brewer, C., Olimpio, C., Clabby, C., Crosby, C., Jenkins, C., Armstrong, C., Bowles, C., Brooks, C., Byrne, C., Maurer, C., Baralle, D., Chubb, D., Stobo, D., Moore, D., O'Sullivan, D., Donnelly, D., Randhawa, D., Halliday, D., Atkinson, E., Baple, E., Rauter, E., Johnston, E., Woodward, E., Maher, E., Sofianopoulou, E., Petrides, E., Lalloo, F., McRonald, F., Pelz, F., Frayling, I., Evans, G., Corbett, G., Rea, G., Clouston, H., Powell, H., Williamson, H., Carley, H., Thomas, H.J.W., Tomlinson, I., Cook, J., Hoyle, J., Tellez, J., Whitworth, J., Williams, J., Murray, J., Campbell, J., Tolmie, J., Field, J., Mason, J., Burn, J., Bruty, J., Callaway, J., Grant, J., Del Rey Jimenez, J., Pagan, J., VanCampen, J., Barwell, J., Monahan, K., Tatton-Brown, K., Ong, K.-R., Murphy, K., Andrews, K., Mokretar, K., Cadoo, K., Smith, K., Baker, K., Brown, K., Reay, K., McKay Bounford, K., Bradshaw, K., Russell, K., Stone, K., Snape, K., Crookes, L., Reed, L., Taggart, L., Yarram, L., Cobbold, L., Walker, L., Walker, L., Hawkes, L., Busby, L., Izatt, L., Kiely, L., Hughes, L., Side, L., Sarkies, L., Greenhalgh, K.-L., Shanmugasundaram, M., Duff, M., Bartlett, M., Watson, M., Owens, M., Bradford, M., Huxley, M., Slean, M., Ryten, M., Smith, M., Ahmed, M., Roberts, N., O'Brien, C., Middleton, O., Tarpey, P., Logan, P., Dean, P., May, P., Brace, P., Tredwell, R., Harrison, R., Hart, R., Kirk, R., Martin, R., Nyanhete, R., Wright, R., Martin, R., Davidson, R., Cleaver, R., Talukdar, S., Butler, S., Sampson, J., Ribeiro, S., Dell, S., Mackenzie, S., Hegarty, S., Albaba, S., McKee, S., Palmer-Smith, S., Heggarty, S., MacParland, S., Greville-Heygate, S., Daniels, S., Prapa, S., Abbs, S., Tennant, S., Hardy, S., MacMahon, S., McVeigh, T., Foo, T., Bedenham, T., Cranston, T., McDevitt, T., Clowes, V., Tripathi, V., McConnell, V., Woodwaer, N., Wallis, Y., Kemp, Z., Mullan, G., Pierson, L., Rainey, L., Joyce, C., Timbs, A., Reuther, A.-M., Frugtniet, B., DeSouza, B., Husher, C., Lawn, C., Corbett, C., Nocera-Jijon, D., Reay, D., Cross, E., Ryan, F., Lindsay, H., Oliver, J., Dring, J., Spiers, J., Harper, J., Ciucias, K., Connolly, L., Tsang, M., Brown, R., Shepherd, S., Begum, S., Daniels, S., Tadiso, T., Linton-Willoughby, T., Heppell, H., Sahan, K., Worrillow, L., Allen, Z., Barlett, M., Watt, C., and Hegarty, M.

Abstract

Conditions and thresholds applied for evidence weighting of within-codon concordance (PM5) for pathogenicity vary widely between laboratories and expert groups. Because of the sparseness of available clinical classifications, there is little evidence for variation in practice.

Published
2022
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16. Photonic crystal reflector laser

Author

Bakoz, A. P., primary, Liles, A. A., additional, Viktorov, E. A., additional, Faolain, L. O', additional, Huyet, G., additional, and Hegarty, S. P., additional

Published
2016
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17. Q-switch in injected quantum dot laser

Author

Viktorov, E. A., primary, Erneux, T., additional, Tykalewicz, B., additional, Goulding, D., additional, Hegarty, S. P., additional, Huyet, G., additional, Dubinkin, I. N., additional, Fedorov, N. A., additional, and Kelleher, B., additional

Published
2016
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34. Thermally stable hybrid cavity laser based on silicon nitride gratings

Author

Iadanza, S., Bakoz, A. P., Singaravelu, P. K. J., Panettieri, D., Schulz, S. A., Devarapu, G. C. R., Guerber, S., Baudot, C., Boeuf, F., Hegarty, S., and O’Faolain, L.

Abstract

In this paper, we show the experimental results of a thermally stable Si_3N_4 external cavity (SiN EC) laser with high power output and the lowest SiN EC laser threshold to our knowledge. The device consists of a 250 μm sized reflective semiconductor optical amplifier butt-coupled to a passive chip based on a series of Si_3N_4 Bragg gratings acting as narrow reflectors. A threshold of 12 mA has been achieved, with a typical side-mode suppression ratio of 45 dB and measured power output higher than 3 mW. Furthermore, we achieved a mode-hop free-lasing regime in the range of 15–62 mA and wavelength thermal stability up to 80°C. This solves the challenges related to cavity resonances’ thermal shift and shows the possibility for this device to be integrated in dense wavelength-division multiplexing (WDM) and heat-intensive optical interconnects technologies.

Published
2018

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