D. Vakhshoori et al., 980 NM SPREAD INDEX LASER WITH STRAIN COMPENSATED INGAAS GAASP/INGAP AND 90-PERCENT FIBER COUPLING EFFICIENCY/, Electronics Letters, 32(11), 1996, pp. 1007-1008
Single transverse and lateral mode InGaAs/GaAsP/InGaP 980 nm SPIN (spr
ead index) ridge waveguide lasers (3 mu m x 750 mu m) with symmetric f
ar fields of theta(perpendicular to) x theta(parallel to) = 17 degrees
x 15 degrees, slope efficiency of eta(ext) = 0.9W/A and threshold cur
rent of I-th = 24mA have been demonstrated. 90% coupling to singlemode
lensed fibre and 52% direct buttcoupling to cleaved fibre has been ac
hieved.