Abstract

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

Mutual injection locki ng of an erbium-doped fiber laser and a fiber-pigtailed Fabry- Perot laser diode

Gong-Ru Lin
Opt. Lett. 28(14) 1203-1205 (2003)

Linewidth reduction and wavelength tuning of an erbium-doped fiber laser by use of a single-mode-selected and side-mode-suppressed Fabry-Perot laser diode

Gong-Ru Lin and Jung-Rung Wu
Appl. Opt. 42(27) 5477-5482 (2003)

Side-mode transmission diagnosis of a multichannel selectable injection-locked Fabry-Perot Laser Diode with anti-reflection coated front facet

Yu-Sheng Liao, Hao-Chung Kuo, Yung-Jui Chen, and Gong-Ru Lin
Opt. Express 17(6) 4859-4867 (2009)

All-optical NRZ-to-PRZ format transformer with an injection-locked Fabry-Perot laser diode at unlasing condition

Yung-Cheng Chang, Yu-Huang Lin, J. H. Chen, and Gong-Ru Lin
Opt. Express 12(19) 4449-4456 (2004)

Ultrahigh supermode noise suppressing ratio of a semiconductor optical amplifier filtered harmonically mode-locked Erbium-doped fiber laser

Gong-Ru Lin, Ming-Chung Wu, Yung-Cheng Chang, and Ci-Ling Pan
Opt. Express 13(18) 7215-7224 (2005)