2.3  W monolithic fiber laser operating in the visible

Area of Science:

• Optics and Photonics
• Laser Technology
• Materials Science

Background:

• Visible fiber lasers are crucial for various applications, but achieving high power and reliability remains a challenge.
• Existing visible laser technologies often suffer from limitations in efficiency, stability, or scalability.
• Diode-pumped solid-state lasers offer potential but monolithic fiber laser designs are less explored in the visible spectrum.

Purpose of the Study:

• To demonstrate the first monolithic visible fiber laser pumped by a pigtailed diode.
• To present a robust cavity design for efficient visible laser operation.
• To establish a foundation for developing high-power, reliable visible fiber laser sources.

Main Methods:

• Designed a monolithic laser cavity incorporating a highly reflective fiber Bragg grating.
• Utilized a double-clad praseodymium-doped fiber as the gain medium.
• Employed a pigtailed diode laser for pumping the fiber cavity.

Main Results:

• Achieved laser signal generation at 635.5 nm.
• The output laser signal was single-mode with a Full Width at Half Maximum (FWHM) bandwidth of 0.16 nm.
• Reached a maximum continuous-wave (cw) output power of 2.3 W.

Conclusions:

• Successfully demonstrated the first diode-pumped monolithic visible fiber laser.
• The proposed robust cavity design enables efficient and reliable visible laser operation.
• This work paves the way for the development of next-generation high-power visible fiber lasers for diverse applications.