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Applied Optics

Applied Optics


  • Vol. 43, Iss. 1 — Jan. 1, 2004
  • pp: 153–159

Spectral characteristics of a regenerative semiconductor optical amplifier mutually injection locked with a Fabry–Perot laser diode

Gong-Ru Lin and Pai-Shen Hsueh  »View Author Affiliations

Applied Optics, Vol. 43, Issue 1, pp. 153-159 (2004)

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The anomalous injection locking of a traveling-wave semiconductor optical amplifier (SOA) and a fiber-pigtailed Fabry–Perot laser diode (FPLD) linked with single-mode and improved side-mode suppression ratio output is demonstrated. We achieve this injection locking by driving the FPLD slightly below threshold and by feedback injecting the FPLD with fractional output of a closed-loop SOA. The SOA-FPLD link lases in a single FPLD longitudinal mode with a reduced linewidth of 0.013 nm and a maximum side-mode-suppressing ratio of 39.7 dB. A precise 3-dB linewidth of 45–50 MHz is also observed from the self-homodyne mode-beating spectrum. The optimized feedback-injecting power for the FPLD is ∼2% of the SOA-FPLD linked output power of >400 μW. The variations in output power and in peak wavelength are not more than 0.54% and 0.06%, respectively. The injection-locked SOA-FPLD link is insensitive to the temperature fluctuation within ±0.25 °C.

© 2004 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(140.3520) Lasers and laser optics : Lasers, injection-locked
(140.4480) Lasers and laser optics : Optical amplifiers

Gong-Ru Lin and Pai-Shen Hsueh, "Spectral Characteristics of a Regenerative Semiconductor Optical Amplifier Mutually Injection Locked with a Fabry-Perot Laser Diode," Appl. Opt. 43, 153-159 (2004)

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