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Single-mode Er-doped fiber random laser with distributed Bragg grating feedback.
N Lizárraga1, N P Puente, E I Chaikina
1División de Física Aplicada, Centro de Investigación Científica y de Educación Superior de Ensenada, Km. 107 carretera Tijuana-Ensenada, Ensenada, B. C., 22860, México.
Optics Express
|January 23, 2009
Summary
This study demonstrates a novel one-dimensional random laser using an Er/Ge co-doped fiber with random Bragg gratings. The random laser exhibits threshold behavior and multiple spectral modes, paving the way for new photonic devices.
Area of Science:
- Photonics and Laser Technology
- Materials Science and Engineering
Background:
- Random lasers offer unique spectral properties due to disordered structures.
- Erbium/Germanium co-doped fibers provide a gain medium for 1550 nm emission.
- Bragg gratings enable resonant cavity formation in optical fibers.
Purpose of the Study:
- To implement and characterize a one-dimensional random laser.
- To investigate the effect of random Bragg grating configurations on laser performance.
- To analyze the spectral characteristics and threshold behavior of the random laser.
Main Methods:
- Fabrication of a one-dimensional random laser using Er/Ge co-doped single-mode fiber.
- Introduction of randomly spaced Bragg gratings to form a complex cavity.
- Optical pumping at 980 nm and spectral analysis of laser emission.
- Numerical simulations using the transfer matrix method for light propagation.
Main Results:
- Successful implementation of a random laser with high-quality factor resonances around 1535.5 nm.
- Observed typical laser threshold behavior as a function of pump power.
- Experimental emission spectra showed multiple competing spectral modes.
- Qualitative agreement between experimental results and numerical simulations.
Conclusions:
- The developed random laser demonstrates tunable spectral properties and threshold behavior.
- Randomly spaced Bragg gratings in doped fibers are effective for creating complex laser cavities.
- This work contributes to the understanding and development of novel random laser systems.
