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Broadly tunable L-band multiwavelength BEFL utilizing nonlinear amplified loop mirror filter.
1Faculty of Engineering, Sohar University, P.O Box 44, Sohar P.C. 311, Oman. mmansoori@soharuni.edu.om
Optics Express
|November 24, 2011
Summary
This study presents a tunable L-band multiwavelength fiber laser using a novel filter. The laser generates 24 stable channels across the L-band, offering wide tunability for optical communications.
Area of Science:
- Photonics
- Optical Engineering
- Laser Physics
Background:
- Fiber lasers are crucial for telecommunications.
- Controlling multiwavelength output in the L-band (1570-1610 nm) is challenging.
- Existing methods often lack wide tunability or stability.
Purpose of the Study:
- To demonstrate a widely tunable L-band multiwavelength Brillouin-erbium fiber laser.
- To utilize a nonlinear amplified fiber loop mirror filter (AFLMF) for enhanced control.
- To achieve stable multiwavelength output with broad spectral coverage.
Main Methods:
- A fiber laser cavity incorporating a nonlinear amplified fiber loop mirror filter (AFLMF) was designed.
- Polarization controllers were used to tune the erbium gain spectrum.
- The AFLMF acted as a wavelength-dependent loss element and amplitude equalizer.
Main Results:
- An average of 24 stable output channels were generated.
- The laser output was tunable across the entire L-band (1570-1610 nm).
- The AFLMF provided control over cavity loss and reflected/transmitted light.
Conclusions:
- The proposed Brillouin-erbium fiber laser design offers wide tunability and stable multiwavelength operation in the L-band.
- The nonlinear AFLMF is effective for gain spectrum shifting and amplitude equalization.
- This laser architecture is promising for optical communication systems requiring flexible L-band sources.
