Single-mode distributed-feedback 761-nm GaAs-AlGaAs quantum-well laser
- 1 May 1995
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 7 (5) , 455-457
- https://doi.org/10.1109/68.384508
Abstract
We have developed single-mode distributed-feedback 761-nm GaAs-AlGaAs quantum well lasers as sources for O/sub 2/ sensing through laser absorption spectroscopy. Devices containing a 4-/spl mu/m-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
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