Title :
Single-mode distributed-feedback 761-nm GaAs-AlGaAs quantum-well laser
Author :
Morris, N.A. ; Connolly, J.C. ; Martinelli, R.U. ; Abeles, J.H. ; Cook, A.L.
Author_Institution :
David Sarnoff Res. Center, Princeton, NJ, USA
fDate :
5/1/1995 12:00:00 AM
Abstract :
We have developed single-mode distributed-feedback 761-nm GaAs-AlGaAs quantum well lasers as sources for O2 sensing through laser absorption spectroscopy. Devices containing a 4-μm-wide ridge waveguide exhibit low threshold currents of 25 mA and quantum efficiencies greater than 35% at output powers in excess of 25 mW. The spectral linewidths of these devices are 12.0 MHz at 15 mW. Temperature- and current-tuning rates are 0.06 nm//spl deg/C and 0.0075 nm/mA (-3.9 GHz/mA), respectively. The devices display smooth, continuous, single-mode wavelength tuning over a 4.2 nm interval.
Keywords :
III-V semiconductors; aluminium compounds; distributed feedback lasers; gallium arsenide; gas sensors; laser modes; laser tuning; measurement by laser beam; quantum well lasers; ridge waveguides; spectral line breadth; waveguide lasers; 15 mW; 25 mA; 25 mW; 35 percent; 4 mum; 761 nm; GaAs-AlGaAs; O/sub 2/; O/sub 2/ sensing; current-tuning rates; laser absorption spectroscop; low threshold currents; output powers; quantum efficiencies; ridge waveguide; single-mode distributed-feedback 761-nm GaAs-AlGaAs quantum-well laser; smooth continuous single-mode wavelength tuning; spectral linewidths; temperature-tuning rates; Distributed feedback devices; Gas lasers; Holographic optical components; Laser tuning; Optical interferometry; Quantum well lasers; Spectroscopy; Surface emitting lasers; Threshold current; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
