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Narrowband and tunable ring optical parametric oscillator with a volume Bragg grating
Björn Jacobsson1, Carlota Canalias, Valdas Pasiskevicius
1Laser Physics, KTH-Royal Institute of Technology, 10691 Stockholm, Sweden. bj@laserphysics.kth.se
Optics Letters
|November 21, 2007
Summary
We developed a compact, tunable nanosecond optical parametric oscillator using a volume Bragg grating. This laser system achieves a narrowed signal spectrum, enabling precise wavelength selection for various applications.
Area of Science:
- Nonlinear Optics
- Laser Physics
- Quantum Electronics
Background:
- Optical parametric oscillators (OPOs) are crucial for generating tunable laser light.
- Traditional OPOs often face challenges with spectral narrowing, tuning simplicity, and compact design.
Purpose of the Study:
- To demonstrate a tunable nanosecond optical parametric oscillator with a significantly narrowed signal spectrum.
- To simplify the tuning mechanism and achieve a compact device design.
Main Methods:
- Utilized a volume Bragg grating (VBG) based retroreflector for spectral control and tuning.
- Employed periodically poled potassium titanyl phosphate (PPKTP) as the nonlinear gain medium.
- Pumped the oscillator at 532 nm with 1.3 mJ of energy.
Main Results:
- Achieved a narrowed signal spectrum with a bandwidth of 0.25 nm (130 GHz) at 760 nm.
- Generated 0.42 mJ of signal energy.
- Demonstrated a tuning range of 5 nm (2.6 THz).
- The VBG retroreflector facilitated simple tuning and a compact oscillator design.
Conclusions:
- The developed VBG-based OPO offers a simple, compact, and effective solution for generating narrow-bandwidth tunable laser light.
- This technology holds promise for applications requiring precise wavelength control in the nanosecond regime.
