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Sampled grating conventional DFB lasers with fabricability and high immunity to the spatial-hole burning
- Source :
- IEEE Photonics Technology Letters. 9:560-562
- Publication Year :
- 1997
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 1997.
-
Abstract
- Sampled grating has been used to enlarge the allowed range of coupling coefficient for high spatial hole-burning corrected single-frequency yield in conventional index-coupled DFB lasers with 1%-80% mirror combination. Theoretical calculation using an effective-index transfer matrix method shows that the allowed range of coupling coefficient increases approximately by 20% in the proposed sampled grating distributed-feedback lasers (DFB) lasers compared with conventional ones. Thus, the tolerance to the coupling coefficient variation improves to the level typically achieved in grating fabrication. The improvement is attributed to the flattened axial photon distribution of gap modes, and therefore stability in other lasing characteristics can be expected.
- Subjects :
- Materials science
business.industry
Transfer-matrix method (optics)
Physics::Optics
Grating
Laser
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
law.invention
Semiconductor laser theory
Optics
law
Optoelectronics
Electrical and Electronic Engineering
business
Diffraction grating
Lasing threshold
Refractive index
Coupling coefficient of resonators
Subjects
Details
- ISSN :
- 19410174 and 10411135
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- IEEE Photonics Technology Letters
- Accession number :
- edsair.doi...........295b96521989099414a47344ab496dbc