The Sidemode-Suppression Ratio of a Tunable DBR Laser

S. L. Woodward; I. M.I. Habbab; T. L. Koch; U. Koren

doi:10.1109/68.62008

The Sidemode-Suppression Ratio of a Tunable DBR Laser

S. L. Woodward, I. M.I. Habbab, T. L. Koch, U. Koren

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

We investigate, both experimentally and theoretically, how the sidemode-suppression ratio (SMSR) of a multisection multiple-quantum-well distributed-Bragg-reflector (MQW-DBR) laser varies with tuning current. We find that as the tuning current is adjusted the wavelength and the SMSR vary, with the peak SMSR ∞ 43 dB. The output power also varies with tuning current, and we can find when the laser is near a mode hop by examination of the light versus tuning current curve. This implies that we can adjust the tuning current so that the laser frequency is near the center of the Bragg band without measuring the SMSR. Our measurements are in good agreement with theory.

Original language	English (US)
Pages (from-to)	854-856
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	2
Issue number	12
DOIs	https://doi.org/10.1109/68.62008
State	Published - Dec 1990
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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abstract = "We investigate, both experimentally and theoretically, how the sidemode-suppression ratio (SMSR) of a multisection multiple-quantum-well distributed-Bragg-reflector (MQW-DBR) laser varies with tuning current. We find that as the tuning current is adjusted the wavelength and the SMSR vary, with the peak SMSR ∞ 43 dB. The output power also varies with tuning current, and we can find when the laser is near a mode hop by examination of the light versus tuning current curve. This implies that we can adjust the tuning current so that the laser frequency is near the center of the Bragg band without measuring the SMSR. Our measurements are in good agreement with theory.",

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AB - We investigate, both experimentally and theoretically, how the sidemode-suppression ratio (SMSR) of a multisection multiple-quantum-well distributed-Bragg-reflector (MQW-DBR) laser varies with tuning current. We find that as the tuning current is adjusted the wavelength and the SMSR vary, with the peak SMSR ∞ 43 dB. The output power also varies with tuning current, and we can find when the laser is near a mode hop by examination of the light versus tuning current curve. This implies that we can adjust the tuning current so that the laser frequency is near the center of the Bragg band without measuring the SMSR. Our measurements are in good agreement with theory.

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The Sidemode-Suppression Ratio of a Tunable DBR Laser

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