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High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
Published on: September 22, 2017
Stabilized single-frequency stimulated Brillouin fiber ring laser.
1Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Optics Letters
|August 25, 2009
Summary
This study details the behavior of a continuous-wave (cw) stimulated Brillouin fiber laser, achieving stable single-frequency output. Researchers observed a lasing threshold of 77 mW and a maximum output of 13 mW, with the gain medium showing homogeneouslike behavior.
Area of Science:
- Optics and Photonics
- Laser Physics
- Fiber Optics
Background:
- Continuous-wave (cw) stimulated Brillouin fiber lasers are crucial for various optical applications.
- Understanding their detailed behavior is essential for optimizing laser performance and stability.
Purpose of the Study:
- To investigate the detailed behavior of a cw stimulated Brillouin fiber laser.
- To characterize the laser's output stability, threshold, and gain medium properties.
Main Methods:
- Utilized a narrow-linewidth cw pump argon laser at 5145 Å.
- Employed an 83-meter fiber ring cavity.
- Stabilized the fiber cavity and employed a 100-kHz modulation feedback system.
Main Results:
- Achieved stable single-frequency Brillouin-laser output.
- Linewidth was primarily determined by the 100-kHz feedback modulation.
- Observed a lasing threshold of 77 mW for a 4.5-microm-core fiber.
- Attained a maximum Brillouin output of 13 mW with 320 mW pump power.
- The Brillouin gain medium exhibited homogeneouslike behavior.
Conclusions:
- Stable single-frequency operation of a cw stimulated Brillouin fiber laser was successfully demonstrated.
- The experimental setup allowed for precise control over laser linewidth and output power.
- The findings contribute to a deeper understanding of Brillouin fiber laser dynamics and their potential applications.
