Stable multiwavelength fiber ring laser with equalized power spectrum based on a semiconductor optical amplifier
✍ Scribed by D. Liu; N.Q. Ngo; H. Liu; D. Liu
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 451 KB
- Volume
- 282
- Category
- Article
- ISSN
- 0030-4018
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✦ Synopsis
We experimentally demonstrated a new structure of a multiwavelength semiconductor optical amplifier (SOA) ring laser based on a fiber Sagnac loop filter that can generate up to 25 stable output lasing wavelengths at room temperature. By varying the length of a polarization-maintaining (PM) fiber within the Sagnac loop filter, the wavelength spacing between the output lasing wavelengths can be changed to a desired value. By tuning a polarization controller (PC) within the Sagnac loop filter, stable multiwavelength 1550-nm operation with up to 17 lasing lines within 3 dB power level variation and with a wavelength spacing of $0.8 nm was achieved. The optical signal-to-noise ratios (OSNRs) of all the lasing wavelengths are greater than 40 dB.