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High-power diode-pumped picosecond Nd(3+):YVO(4) laser
Optics Letters
|January 12, 2008
Summary
A novel diode-pumped neodymium-doped yttrium orthovanadate (Nd(3+):YVO(4)) laser was developed. This laser generates ultrashort, linearly polarized pulses for potential applications in high-speed optical processing.
Area of Science:
- Optics and Photonics
- Laser Physics
- Materials Science
Background:
- Diode-pumped solid-state lasers offer efficient and compact solutions.
- Passively mode-locked lasers generate ultrashort optical pulses.
- Nonlinear optical elements, such as nonlinear mirrors, are crucial for mode-locking.
Purpose of the Study:
- To develop a diode-pumped Nd(3+):YVO(4) laser passively mode-locked using a nonlinear mirror.
- To characterize the output performance, including pulse duration, power, and polarization.
Main Methods:
- Utilized a fiber-coupled 10-W diode array for pumping the Nd(3+):YVO(4) crystal.
- Employed a nonlinear mirror based on second-harmonic generation for passive mode-locking.
- Optimized focusing within the nonlinear crystal to achieve shorter pulse durations.
Main Results:
- Generated nearly diffraction-limited, linearly polarized 11-picosecond pulses at 1064 nm.
- Achieved an average output power of 2.7 W at a 150-MHz repetition rate.
- Measured pulse durations as short as 7.9 ps with reduced output power (1.35 W).
Conclusions:
- The developed laser system demonstrates efficient generation of ultrashort, high-quality laser pulses.
- The nonlinear mirror approach is effective for passive mode-locking of diode-pumped Nd(3+):YVO(4) lasers.
- Further optimization of focusing may yield even shorter pulses for advanced applications.
