DocumentCode :
1335060
Title :
1.3- 
m Laterally Tapered Ridge Waveguide DFB Lasers With Second-Order Cr Surface Gratings
Author :
Yeo, Chan Il ; Jang, Sung Jun ; Yu, Jae Su ; Lee, Yong Tak
Author_Institution :
Dept. of Inf. & Commun., Gwangju Inst. of Sci. & Technol., Gwangju, South Korea
Volume :
22
Issue :
22
fYear :
2010
Firstpage :
1668
Lastpage :
1670
Abstract :
We report the laterally tapered ridge waveguide InGaAsP-InGaAsP multiple quantum-well distributed-feedback (DFB) lasers with metal surface gratings, operating at λ ~1.3 μm, by holographic lithography. Single-tapered and double-tapered (bow-tie) ridge waveguide DFB structures with second-order Cr surface gratings are employed to enhance the coupling efficiency. The 600-μm-long laterally coupled DFB laser with a double-tapered ridge waveguide structure exhibits significantly improved single-mode operation without mode hopping, with a maximum sidemode suppression ratio of 42 dB and temperature-dependent wavelength shift up to d λ/dT ~0.071 nm/K.
Keywords :
chromium; diffraction gratings; distributed feedback lasers; gallium arsenide; holography; indium compounds; laser modes; lithography; optical couplers; optical waveguides; quantum well lasers; ridge waveguides; Cr; DFB lasers; InGaAsP-InGaAsP; coupling efficiency; double-tapered ridge waveguide; holographic lithography; laterally tapered ridge waveguide; metal surface gratings; multiple quantum-well distributed-feedback lasers; second-order Cr surface gratings; sidemode suppression ratio; single-mode operation; single-tapered ridge waveguide; size 600 mum; temperature-dependent wavelength shift; wavelength 1.3 mum; Distributed feedback devices; Gratings; Laser feedback; Laser modes; Optical waveguides; Surface waves; Waveguide lasers; Cr surface gratings; InGaAsP–InGaAsP multiple quantum-well (MQW); distributed-feedback (DFB) lasers; laterally tapered ridge waveguide;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/LPT.2010.2079323
Filename :
5585713
Link To Document :
