Two-step laterally tapered spot-size converter 1.55-/spl mu/m DFB laser diode having a high slope efficiency.

Authors :: Park, S.W.
Han, J.H.
Han, Y.T.
Park, S.S.
Yoon, B.Y.
Kim, B.K.
Sung, H.K.
Song, J.I.
Source :: IEEE Photonics Technology Letters; 10/15/2006, Vol. 18 Issue 20, p2138-2140, 3p
Publication Year :: 2006
Abstract: We demonstrate a two-step lateral tapered 1.55-mum spot-size converter distributed feedback laser diode (SSC DFB LD) having slope efficiencies as high as 0.457 and 0.319 mW/mA measured at 25 degC and 85 degC, respectively. The SSC DFB LD fabricated by using a nonselective grating process has a double core waveguide structure including a planar buried heterostructure type active waveguide and a ridge type passive waveguide. The fabricated SSC DFB LD operates at 1.553-mum wavelength and shows a far-field pattern in horizontal and vertical directions of 7.3deg and 11.6deg, respectively [ABSTRACT FROM PUBLISHER]

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