Generation of wavelength-tunable optical short pulses with a highly improved side-mode-suppression ratio over a large wavelength-tuning range
✍ Scribed by J. W. Chen; D. N. Wang; Z. N. Li
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 168 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
We have developed a self-seeding system to generate wavelength-tunable optical short pulses with a highly improved sidemode-suppression ratio (SMSR) over a large wavelength-tuning range. The external cavity of the gain-switched Fabry-Pe ´rot laser diode consists of two fiber Bragg gratings (FBGs) connected in series, an erbiumdoped fiber amplifier (EDFA), an optical coupler, and two circulators. The two gratings exhibit distinct peak wavelengths and each can be tuned across nearly the 20-nm range. The system is simple and efficient and the side-mode-suppression ratio achieved is about 40 dB over a 24-nm wavelength-tuning range.