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Tunable single frequency fiber laser based on FP-LD injection locking.
Aiqin Zhang1, Xinhuan Feng, Minggui Wan
1Institute of Photonics Technology, Jinan University, Guangzhou, China.
Optics Express
|June 6, 2013
Summary
We developed a tunable single frequency fiber laser using Fabry Pérot laser diode (FP-LD) injection locking. This method achieves narrow linewidth and wavelength switchability for advanced laser applications.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Single frequency fiber lasers are crucial for applications requiring narrow linewidth and precise wavelength control.
- Existing methods for achieving single frequency operation can be complex or limited in tunability.
Purpose of the Study:
- To propose and demonstrate a novel tunable single frequency fiber laser system.
- To achieve wavelength switchable single frequency lasing with a narrow linewidth.
Main Methods:
- Utilizing a Fabry Pérot laser diode (FP-LD) for injection locking within a fiber ring laser cavity.
- Employing a tunable optical filter (TOF) to select specific longitudinal modes of the FP-LD.
- Adjusting the FP-LD drive current to shift lasing modes for wavelength tuning.
Main Results:
- Demonstrated a tunable single frequency fiber laser with a wavelength tunable range of 32.4 nm.
- Achieved a side-mode suppression ratio (SMSR) of at least 41 dB for each wavelength.
- Obtained a narrow linewidth of approximately 13 kHz.
Conclusions:
- The proposed FP-LD injection locking technique effectively produces tunable single frequency fiber laser output.
- The system offers a practical approach for achieving wavelength switchable, narrow linewidth laser sources.
