External injection-seeding scheme with selected wavelength feedback to the master Fabry-Perot laser diode for wavelength-tunable optical short-pulse generation

Xiaohui Fang; Dong-Ning Wang; Wei Jin; Pak L. Chu; Jie Li; Yunqi Liu

doi:10.1364/JOSAB.23.000020

Journal of the Optical Society of America B
Vol. 23,
Issue 1,
pp. 20-25
(2006)
•https://doi.org/10.1364/JOSAB.23.000020

External injection-seeding scheme with selected wavelength feedback to the master Fabry–Perot laser diode for wavelength-tunable optical short-pulse generation

Xiaohui Fang, Dong-Ning Wang, Wei Jin, Pak L. Chu, Jie Li, and Yunqi Liu

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Xiaohui Fang, Dong-Ning Wang, Wei Jin, Pak L. Chu, Jie Li, and Yunqi Liu, "External injection-seeding scheme with selected wavelength feedback to the master Fabry-Perot laser diode for wavelength-tunable optical short-pulse generation," J. Opt. Soc. Am. B 23, 20-25 (2006)

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Abstract

An external injection-seeding scheme with selected wavelength feedback to the master Fabry–Perot laser diode is developed to improve the side-mode suppression ratio (SMSR) and extend the wavelength tuning range of the injection-seeded optical short pulses. A SMSR of higher than 31 dB over a wavelength tuning range of 20.4 nm has been obtained. For a SMSR of higher than 40 dB, the wavelength tuning range achieved is 13.8 nm. The system is simple and can operate at arbitrary repetition frequency.

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Parameter	Meaning	Value
g	Differential gain	$5.6 \times 10^{4} s^{- 1}$
γ	Losses	$4 \times 10^{11} s^{- 1}$
$γ_{e}$	Inverse carrier lifetime	$5 \times 10^{8} s^{- 1}$
$N_{0}$	Transparency value for the carrier number	$6.8 \times 10^{7}$
β	Spontaneous emission rate	$1.1 \times 10^{4} s^{- 1}$
α	Linewidth enhancement factor	5
s	Gain compression factor	$0.7 \times 10^{- 6}$
$τ_{L}$	Cavity round-trip time	$7 \times 10^{- 12} s$
$R_{2}$	Facet reflectivity	$7 \times 10^{- 12} s$
$η_{ext}$	Coupling losses	1

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Journal of the Optical Society of America B