Single-frequency Brillouin lasing using single-mode As(2)Se(3) chalcogenide fiber.

Area of Science:

• Photonics and optical engineering
• Materials science
• Fiber optics

Background:

• Brillouin lasing is a nonlinear optical process.
• Single-longitudinal mode operation is crucial for many laser applications.
• Chalcogenide fibers offer unique nonlinear properties.

Purpose of the Study:

• To demonstrate single-longitudinal mode Brillouin lasing in As2Se3 single-mode fiber for the first time.
• To investigate the performance of As2Se3 fiber in a fiber Fabry-Perot cavity.
• To achieve efficient Stokes wave generation and power conversion.

Main Methods:

• Utilized a 2-m long As2Se3 single-mode fiber in a Fabry-Perot cavity.
• Employed a nonresonant pump laser at 1.55 µm.
• Measured pump and Stokes power to determine conversion efficiency.

Main Results:

• Achieved single-longitudinal mode Brillouin lasing at 1.55 µm.
• Demonstrated sufficient Brillouin gain from As2Se3 fiber for oscillation.
• Obtained 12 mW of Stokes power with 78 mW pump power, yielding 15% conversion efficiency.

Conclusions:

• As2Se3 single-mode fiber is a viable material for achieving single-frequency Brillouin lasing.
• The demonstrated efficiency highlights the potential of chalcogenide fibers in nonlinear optics.
• This work opens new avenues for developing compact and efficient fiber lasers.