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Single-mode cw Cr(3+):LiSrAlF(6) laser using an external fiber grating.
Optics Letters
|November 3, 2009
Summary
Researchers achieved efficient single-mode operation in a chromium-doped lithium strontium aluminum fluoride (Cr(3+):LiSAF) laser. This was accomplished by self-injection locking the laser oscillator with a specialized fiber grating, optimizing laser performance.
Area of Science:
- Laser Physics
- Materials Science
Background:
- Cr(3+):LiSAF lasers are valuable for tunable laser applications.
- Achieving stable single-mode operation in such lasers can be challenging.
- External cavity configurations are often used to control laser output.
Purpose of the Study:
- To develop a Cr(3+):LiSAF laser oscillator with stable single-mode operation.
- To investigate the effectiveness of fiber gratings for laser self-injection locking.
- To optimize laser performance through controlled feedback.
Main Methods:
- Constructed a Cr(3+):LiSAF laser oscillator.
- Utilized an externally coupled fiber grating for self-injection locking.
- Fabricated the fiber grating using holographic techniques with KrF UV laser exposure.
- Employed a 67% reflectivity fiber grating for single-mode selection.
Main Results:
- Successfully achieved stable single-mode operation in the Cr(3+):LiSAF laser.
- Demonstrated the efficacy of fiber grating self-injection locking for mode control.
- The holographic fabrication technique allowed for precise grating reflectivity.
Conclusions:
- Self-injection locking with a fiber grating is an effective method for achieving single-mode operation in Cr(3+):LiSAF lasers.
- The use of a fiber grating with optimized reflectivity is crucial for efficient single-mode performance.
- This technique offers a practical approach for developing high-performance tunable lasers.
