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Generation of a switchable and tunable rectangular pulse and multi-pulse with different peak powers at the L-band
Applied Optics
|June 10, 2024
Summary
This study introduces a novel L-band fiber laser using a nonlinear optical loop mirror (NOLM) for mode-locking. It demonstrates tunable rectangular and dual-wavelength pulse generation, including harmonic mode-locking (HML) and peak power clamping (PPC) effects.
Area of Science:
- * Photonics and Laser Technology
- * Nonlinear Optics
- * Fiber Optic Lasers
Background:
- * Erbium-doped fiber lasers are crucial for optical communications.
- * Mode-locking techniques are essential for generating ultrashort pulses.
- * L-band operation offers potential for increased bandwidth.
Purpose of the Study:
- * To present a novel L-band erbium-doped fiber laser.
- * To investigate pulse generation characteristics using a nonlinear optical loop mirror (NOLM) mode-locker.
- * To explore dual-wavelength, harmonic mode-locking (HML), and pulse evolution under varying pump power.
Main Methods:
- * Design and implementation of an L-band erbium-doped fiber laser.
- * Utilizing a nonlinear optical loop mirror (NOLM) as the mode-locking element.
- * Employing polarization controllers (PCs) for precise tuning and pulse shaping.
Main Results:
- * Achieved generation of rectangular pulses at single wavelengths (1593 nm, 1571 nm) and dual-wavelength operation.
- * Demonstrated harmonic mode-locking (HML) capability.
- * Observed trapezoidal and low-peak-power rectangular pulses, with the latter exhibiting peak power clamping (PPC) and consistent positioning across pump powers and harmonic orders.
Conclusions:
- * The novel NOLM-based L-band fiber laser offers versatile pulse generation capabilities.
- * The observed peak power clamping (PPC) effect in low-peak-power pulses provides insights into laser dynamics.
- * The distinct pulse evolution characteristics highlight the laser's tunability and potential for advanced applications.
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