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Tunable Narrow-Linewidth Fiber Laser Based on the Acoustically Controlled Polarization Conversion in Dispersion Compensation Fiber.
- Source :
- Journal of Lightwave Technology; 5/1/2022, Vol. 40 Issue 9, p2971-2979, 9p
- Publication Year :
- 2022
-
Abstract
- Researches on high coherence light sources always pursue fast tuning speed, linear tunability and persistence of narrow linewidths at different tuning channels. Fortunately, acousto-optical interaction (AOI) can be employed in the fast management of the lasing wavelength. Herein, we propose a fast tunable narrow-linewidth fiber laser assisted by the acoustically-induced polarization selection in dispersion compensation fiber (DCF). The lasing wavelength is determined by the acoustically-induced band-pass grating in DCF. The large dispersion slope of the DCF suppresses the bandwidth of the TM01 peak to be less than 1 nm. The acousto-optic-controlled polarization conversion effectively restrains the acousto-optic frequency shift. With side longitudinal mode suppressions induced by the combintion of the self-injection feedback and saturable absorption filtering, the output laser successfully achieves the narrow-linewdith operation and owns a low relative intensity noise floor of −135 dB/Hz. By controlling the acoustic-wave frequency, the laser can be linearly tuned with a large wavelength range (over 20 nm, linear fitting R2 reaches 0.99781), and the laser linewidths remain about ∼2 kHz in different tuning channels. The laser tuning dynamics under the acousto-optical controlling are experimentally revealed, and the lasing tuning response time is ∼800 μs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 07338724
- Volume :
- 40
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Journal of Lightwave Technology
- Publication Type :
- Academic Journal
- Accession number :
- 157582203
- Full Text :
- https://doi.org/10.1109/JLT.2022.3145660