Intra-cavity power effects in singly resonant cw OPOs

Henderson, Angus; Stafford, Ryan

doi:10.1007/s00340-006-2342-7

Cited by 46 publications

(37 citation statements)

References 8 publications

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“…Residual signal and pump in the output were blocked by a plane CaF 2 mirror coated for transmission of <0.25% over the pump and signal tuning ranges and >95% at the idler. Figure 1 shows the OPO Thresholds as low as 1 W were observed, consistent with reports for similar OPOs when operated with strongly signalresonant cavities [15]. The tuning range was found to be limited at the high wavenumber end by signal losses and low wavenumbers by idler absorption in the MgO:PPLN crystal.…”

Section: Experimental Arrangementsupporting

confidence: 83%

Wavelength-swept optical parametric oscillator for broadband mid-infrared spectroscopy

Silva

Lindsay

2012

Appl. Phys. B

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In this work we describe a wavelength-swept continuous-wave optical parametric oscillator (OPO) for the rapid acquisition of mid-infrared spectra spanning over hundreds of wavenumbers. Rapid tuning of a ytterbium-doped fibre pump laser resulted in the OPO idler tuning over 900 cm −1 in 3.36 ms at a resolution of 4.5 cm −1 , within a total accessible range of 2.67 to 4.34 µm (2304-3752 cm −1 ). Predictable tuning characteristics allowed simple online calibration of recorded spectra for absolute mid-infrared frequency. The system thus offers a viable approach to broadband spectral acquisition in applications requiring highradiance illumination.

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Section: Experimental Arrangementsupporting

confidence: 83%

Wavelength-swept optical parametric oscillator for broadband mid-infrared spectroscopy

Silva

Lindsay

2012

Appl. Phys. B

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“…Resonant cw optical parametric oscillators (OPO) have recently emerged as very high power (W) tunable laser sources and are also based on PPLN crystals [21]. Such high power OPO's may prove ideal for applications which employ photoacoustic detection (discussed in more detail in the following section) which offers small sampling volumes.…”

Section: State Of Alternative Mid-ir Laser Sourcesmentioning

confidence: 99%

Difference frequency generation laser based spectrometers

Richter¹,

Fried

Weibring

2009

Laser & Photonics Reviews

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Tunable mid-infrared laser sources are the key to precision optical trace gas detection. Difference-frequency generation (DFG) based laser sources are among a few practical laser sources that have demonstrated ultra-high detection sensitivities during real-world applications when combined with appropriate signal enhancing and noise reduction spectroscopic techniques. This article will discuss the technical approaches, illustrate application examples of DFG sources, and offer perspectives to competing technologies.A He-Ne alignment laser visualizes a reentrant beam pattern of a 100 m, 182 pass astigmatic Herriott multi-pass absorption cell used in highly sensitive trace gas DFG spectrometers.

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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].…”

mentioning

confidence: 79%

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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Intra-cavity power effects in singly resonant cw OPOs

Cited by 46 publications

References 8 publications

Wavelength-swept optical parametric oscillator for broadband mid-infrared spectroscopy

Wavelength-swept optical parametric oscillator for broadband mid-infrared spectroscopy

Difference frequency generation laser based spectrometers

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

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