The side-mode-suppression ratio of a tunable DBR laser
- AT and T Bell Labs., Holmdel, NJ (USA)
The authors investigate, both experimentally and theoretically, how the side-mode-suppression ratio (SMSR) of a multisection multiple-quantum-well distributed-Bragg-reflector (MQW-DBR) laser varies with tuning current. They find that as the tuning current is adjusted the wavelength and the SMSR vary, with the peak SMSR {approx equal} 43 dB. The output power also varies with tuning current, and the authors can find when the laser is near a mode hop by examination of the light versus tuning current curve. This implies that they can adjust the tuning current so that the laser frequency is near the center of the Bragg band without measuring the SMSR. The author's measurements are in good agreement with theory.
- OSTI ID:
- 5937335
- Journal Information:
- IEEE Photonics Technology Letters (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Photonics Technology Letters (Institute of Electrical and Electronics Engineers); (USA) Vol. 2:12; ISSN IPTLE; ISSN 1041-1135
- Country of Publication:
- United States
- Language:
- English
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