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Single-frequency narrow-linewidth Tm-doped fiber laser using silicate glass fiber
Jihong Geng1, Qing Wang, Tao Luo
1AdValue Photonics, 4585 S Palo Verde Road, Suite 405, Tucson, Arizona 85714, USA. jgeng@advaluephotonics.com
Optics Letters
|November 21, 2009
Summary
Researchers achieved narrow-linewidth, single-frequency laser operation near 2 micrometers using a novel thulium-doped fiber laser. This breakthrough offers the narrowest linewidth to date for 2-micrometer single-frequency lasers.
Area of Science:
- Photonics and Optical Engineering
- Laser Physics
- Materials Science
Background:
- Single-frequency lasers operating near 2 micrometers are crucial for various applications.
- Developing compact and efficient fiber lasers in this wavelength range remains a challenge.
Purpose of the Study:
- To demonstrate single-frequency laser operation in a novel, heavily thulium-doped multicomponent silicate glass fiber.
- To achieve the narrowest possible laser linewidth for 2-micrometer single-frequency lasers.
Main Methods:
- Fabrication of a short-cavity (2-6 cm) all-fiber distributed feedback laser using Tm-doped fiber.
- Utilizing both cladding- and core-pumping configurations.
- Employing a 1575 nm Er-doped fiber laser as the core-pump source.
Main Results:
- Successful single-frequency laser operation achieved at 1950 nm.
- Demonstrated a laser linewidth of less than 3 kHz.
- This represents the narrowest linewidth reported for any 2-micrometer single-frequency laser to date.
Conclusions:
- The newly developed Tm-doped fiber enables high-performance single-frequency laser operation.
- The short-cavity distributed feedback laser design is effective for achieving narrow linewidths.
- This work sets a new benchmark for 2-micrometer single-frequency fiber lasers.
