Title :
Two-step laterally tapered spot-size converter 1.55-μm DFB laser diode having a high slope efficiency
Author :
Park, S.W. ; Han, J.H. ; Han, Y.T. ; Park, S.S. ; Yoon, B.Y. ; Kim, Byeong Koo ; Sung, H.K. ; Song, J.I.
Author_Institution :
Opt. Commun. Res. Center, Gwangju
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
Keywords :
distributed feedback lasers; laser transitions; optical fabrication; optical planar waveguides; ridge waveguides; semiconductor lasers; waveguide lasers; 1.55 mum; 1.553 mum; 25 degC; 85 degC; DFB laser diode; distributed feedback laser diode; nonselective grating; planar buried heterostructure type active waveguide; ridge type passive waveguide; slope efficiency; spot-size converter; Diode lasers; Distributed feedback devices; Integrated optics; Optical devices; Optical feedback; Optical network units; Optical waveguides; Passive optical networks; Planar waveguides; Programmable control; Current blocking layer; slope efficiency; spot-size converter distributed feedback laser diode (SSC DFB LD);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.883169
