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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 21, Iss. 12 — Dec. 1, 2003
  • pp: 3441–

Measurement of Gain in Pump Diode Lasers Using a Low-Coherence Source and Synchronous Detection

J. Troger

Journal of Lightwave Technology, Vol. 21, Issue 12, pp. 3441- (2003)


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Abstract

A novel method for determining gain in long-cavity Fabry-Pérot diode lasers is presented. Gain is extracted from a return-loss measurement via a simple model. The experimental setup is based on the injection of a low-coherence probe signal into the laser cavity and synchronous detection of the reflected light. Using a fiber-optics setup, gain can be determined in commercial fiber-coupled laser modules. The novel technique is particularly suitable for diode lasers with very long cavities. To illustrate the method,the gain spectra of a 980-nm pump diode laser with 1800-µm cavity length are determined. Gain saturation due to probe signal injection is addressed.

© 2003 IEEE

Citation
J. Troger, "Measurement of Gain in Pump Diode Lasers Using a Low-Coherence Source and Synchronous Detection," J. Lightwave Technol. 21, 3441- (2003)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-21-12-3441

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