DocumentCode :
1240075
Title :
Design for high-power single-mode operation from 2-D surface-emitting ROW-DFB lasers
Author :
Shuang Li ; Botez, D.
Author_Institution :
Reed Center for Photonics, Univ. of Wisconsin, Madison, WI, USA
Volume :
17
Issue :
3
fYear :
2005
fDate :
3/1/2005 12:00:00 AM
Firstpage :
519
Lastpage :
521
Abstract :
Stable single-mode single-lobe operation to high powers is predicted for two-dimensional surface-emitting lasers, if second-order distributed feedback/distributed Bragg reflector (DFB/DBR) gratings are preferentially placed in the elements of a resonant-optical-waveguide array. Beside their usual functions (i.e., feedback and outcoupling), the gratings act as an effective array-mode selector due to different interaction with the gratings of different array modes. The in-phase array mode is strongly favored to lase around its (lateral) resonance due to better field overlap with DFB region and lower interelement absorption loss than for nonresonant array modes. For 20-element arrays with 700/600 μm DFB/DBR gratings, emitting at /spl lambda/=0.98 μm, high (/spl sim/100 A/cm2) intermodal discrimination /spl Delta/J/sub th/ is obtained. /spl Delta/J/sub th/ is enhanced to /spl sim/225 A/cm2 by introducing free-carrier absorption in the array-interelement regions.
Keywords :
arrayed waveguide gratings; distributed Bragg reflector lasers; distributed feedback lasers; laser cavity resonators; laser modes; quantum well lasers; surface emitting lasers; 0.98 mum; 20-element arrays; 2D surface emitting lasers; ROW-DFB lasers; array-interelement regions; array-mode selector; distributed Bragg reflector gratings; free-carrier absorption; high-power laser operation; inphase array modes; interelement absorption loss; intermodal discrimination; laser design; nonresonant array modes; quantum well lasers; resonant-optical-waveguide array; second-order distributed feedback gratings; single-mode laser operation; stable laser operation; Absorption; Distributed Bragg reflectors; Distributed feedback devices; Gratings; Laser feedback; Laser modes; Laser stability; Optical design; Resonance; Surface emitting lasers; Active photonic crystals; distributed-feedback (DFB) lasers; phase-locked oscillators; semiconductor lasers; surface-emitting lasers;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/LPT.2004.842388
Filename :
1396000
Link To Document :
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