Thermal effects in singly resonant continuous-wave optical parametric oscillators

Vainio, Markku; Peltola, Jari; Persijn, Stefan; Harren, F.J.M.; Halonen, Lauri

doi:10.1007/s00340-008-3287-9

Cited by 67 publications

(69 citation statements)

References 38 publications

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“…Degradation of performance due to thermal lensing are predicted [5] and observed in MgO:PPLN cw OPOs for a pump power higher than 10 W at 1064 nm [6,7]. For a cw OPO pumped at 532 nm, the detrimental effects of thermal lensing are observed already at a pump power below 2 W [8].…”

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confidence: 82%

Self-guided operation of singly resonant continuous-wave optical parametric oscillator based on bulk MgO-doped PPLN

et al. 2012

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We report on a self-guided operation of a greenpumped singly resonant continuous-wave optical parametric oscillator with a bulk MgO-doped PPLN crystal. It is achieved by increasing the OPO cavity length beyond the stability boundary so that the OPO can only oscillate with formation of a thermally induced waveguide inside the crystal. The effects of the thermal waveguide on the OPO performance are studied by measuring output power characteristics at different cavity lengths. Improvement of spatial mode quality and stability of output power by self-guiding is demonstrated. Measurement of temporal characteristics proves that formation of the waveguide originates from the photo-thermal effect in the nonlinear crystal by absorption of pump power.

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confidence: 82%

Self-guided operation of singly resonant continuous-wave optical parametric oscillator based on bulk MgO-doped PPLN

et al. 2012

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“…The cw-OPO can produce high output power in the wavelength region of 2.75-3.45 μm. A detailed description of the cw-OPO is presented in our previous papers [26,27]. The OPO is pumped with a single-frequency Yb fiber laser system consisting of a seed laser (Koheras) and an optical amplifier (IPG YAR-20K-1064-LP-SF).…”

Section: Methodsmentioning

confidence: 99%

Off-axis re-entrant cavity ring-down spectroscopy with a mid-infrared continuous-wave optical parametric oscillator

et al. 2012

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We demonstrate an off-axis cavity ring-down spectroscopy system, which uses a mid-infrared continuouswave optical parametric oscillator as a light source. Off-axis injection with re-entrant configuration of the ring-down cavity is used to achieve high spectral resolution while maintaining high measurement speed. This makes the setup suitable for sensitive molecular spectroscopy in the mid-infrared region, particularly for studies that require high temporal resolution. Formaldehyde (H 2 CO) absorption spectrum at 3.4 μm is measured using the off-axis re-entrant cavity ringdown spectrometer.

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“…1.9. [21] The OPO resonator is designed to produce a mode-matched waist size of 11 µm in the crystal for the resonant mid-infrared beam. The resonator consists of 6 mirrors, all of which are gold coated except for the pump input mirror, which has a dielectric coating that is designed for high transmission of ~90% at the pump wavelength, and for high reflectivity of > 99% at the resonant mid-infrared wavelengths, between 2.9 and 3.4 µm (Laseroptik GmbH).…”

Section: Methodsmentioning

confidence: 99%

Fully stabilized mid-infrared frequency comb for high-precision molecular spectroscopy

Vainio

Karhu

2017

Opt. Express

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Abstract:A fully stabilized mid-infrared optical frequency comb spanning from 2.9 to 3.4 µm is described. The comb is based on half-harmonic generation in a femtosecond optical parametric oscillator, which transfers the high phase coherence of a fully stabilized nearinfrared Er-doped fiber laser comb to the mid-infrared region. The method is simple, as no phase-locked loops or reference lasers are needed. Precise locking of optical frequencies of the mid-infrared comb to the pump comb is experimentally verified at sub-20 mHz level, which corresponds to a fractional statistical uncertainty of 2×10 -16 at the center frequency of the midinfrared comb. The fully stabilized mid-infrared comb is an ideal tool for high-precision molecular spectroscopy, as well as for optical frequency metrology in the mid-infrared region, which is difficult to access with other stabilized frequency comb techniques.

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Thermal effects in singly resonant continuous-wave optical parametric oscillators

Cited by 67 publications

References 38 publications

Self-guided operation of singly resonant continuous-wave optical parametric oscillator based on bulk MgO-doped PPLN

Self-guided operation of singly resonant continuous-wave optical parametric oscillator based on bulk MgO-doped PPLN

Off-axis re-entrant cavity ring-down spectroscopy with a mid-infrared continuous-wave optical parametric oscillator

Fully stabilized mid-infrared frequency comb for high-precision molecular spectroscopy

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