Distributed Bragg-reflector Pb(1-x)Sn(x)Te/PbSe(y)Te(1-y) diode lasers
Abstract
Distributed Bragg-reflector (DBR) diode lasers were designed and fabricated from lattice-matched Pb(1-x)Sn(x)Te/PbSe(y)Te(1-y) single heterostructures grown by liquid-phase epitaxy. These DBR lasers operated in a single longitudinal mode within a limited range of heat-sink temperatures, 8.5-38 K, with a threshold current density of about 3 kA/sq cm at 20 K. Single longitudinal mode operation was maintained up to more than three times the threshold current. Continuous tuning of the laser output frequency over a range of 6/cm, near 775/cm (12.9 microns), was achieved by varying the heat-sink temperature. The average tuning rate was 0.21 per cm/K, and it was much smaller than the rate for corresponding Fabry-Perot lasers, which was 2.3 per cm/K. The measured effective mode index of the DBR lasers agrees well with the calculated one.
- Publication:
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IEEE Journal of Quantum Electronics
- Pub Date:
- December 1985
- DOI:
- Bibcode:
- 1985IJQE...21.1947K
- Keywords:
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- Dbr Lasers;
- Laser Outputs;
- Lead Selenides;
- Lead Tellurides;
- Semiconductor Diodes;
- Semiconductor Lasers;
- Tin Tellurides;
- Tunable Lasers;
- Bragg Angle;
- Coupling Coefficients;
- Fabrication;
- Gratings (Spectra);
- Laser Modes;
- Optical Waveguides;
- Reflectance;
- Lasers and Masers