AgGaS
                  2
           optical parametric oscillator continuously tunable from 3.9 to 11.3 μm

Vodopyanov, K. L.; Maffetone, J.P.; Zwieback, Ilya; Ruderman, W.

doi:10.1063/1.124642

Cited by 85 publications

(41 citation statements)

References 16 publications

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“…Vodopyanov et al [21] have also demonstrated type-II phase-matched AgGaS 2 OPO pumped by nanosecond pulsed Nd:YAG laser and obtained linewidth of about 1 cm −1 in the spectral range of 3.8-11.0 μm.…”

Section: Employing Type-ii Phase Matchingmentioning

confidence: 93%

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Narrow linewidth pulsed optical parametric oscillator

Das

2010

Pramana - J Phys

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Tunable narrow linewidth radiation by optical parametric oscillation has many applications, particularly in spectroscopic investigation. In this paper, different techniques such as injection seeding, use of spectral selecting element like grating, grating and etalon in combination, grazing angle of incidence, entangled cavity configuration and type-II phase matching have been discussed for generating tunable narrow linewidth radiation by singly resonant optical parametric oscillation process.

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Section: Employing Type-ii Phase Matchingmentioning

confidence: 93%

“…Linewidth of the generated radiation can also be reduced to some extent using type-II phase matching due to steepness of the phase matching angle [20,21]. Brosenberg et al [20] have demonstrated type-II phase-matched BBO OPO pumped at 355 nm nanosecond radiations.…”

Section: Employing Type-ii Phase Matchingmentioning

confidence: 97%

Narrow linewidth pulsed optical parametric oscillator

Das

2010

Pramana - J Phys

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“…A third approach, infrared lasers based on difference-frequency generation (DFG) in bulk non-linear crystals which has been developed already in the 1970s [25], is also experimentally difficult because of the need for high-power pumping lasers, and the problems related to phase matching in the non-linear materials when scanning broad spectral regions (more than a few 10 cm À1 ) [26,27]. Similar difficulties are also relevant for cw optical parametric oscillators (OPOs) [28,29].…”

Section: Introductionmentioning

confidence: 98%

A continuous-wave difference-frequency generation laser operating in the mid-infrared (3–5μm) region for accurate line intensity measurements

Flaud

Orphal

2008

Infrared Physics & Technology

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“…Further improvement was limited by the damage of coating on cavity mirrors. The optical damage of cavity mirror and oscillating surface of the prism appeared at the input pump power density up to 34 MW/cm 2 , while no damage were seen both on the surfaces and inside of the crystal in OPO cavity, which we analyzed were contributed by the good growth, polishing and coating technique of the crystal comparing with other data [3][4][5][6]. This kind of cavity scheme can also be expected to benefit the linewidth and stability, which are going to be investigated in the near future.…”

mentioning

confidence: 99%

“…There are two effective methods to generate it: second harmonic generation (SHG) of CO 2 laser [1, 2] and optical parametric oscillator (OPO) [3][4][5][6][7][8][9][10]. The former has the limited tuning range at the atmospheric window, which is due to the limited tunable range of CO 2 laser.…”

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confidence: 99%

3–5 μm AgGaS2 optical parametric oscillator with prism cavity

Wang

Zhang

et al. 2009

Laser Phys.

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1 Tunable mid-infrared laser sources operating at the transparency windows of 3-5 µ m in the atmosphere are more and more important for applications in laser remote sensing, laser target detecting, spectra analysis, atmospheric environment monitoring, space communication and applications in military. There are two effective methods to generate it: second harmonic generation (SHG) of CO 2 laser [1, 2] and optical parametric oscillator (OPO) [3][4][5][6][7][8][9][10]. The former has the limited tuning range at the atmospheric window, which is due to the limited tunable range of CO 2 laser. The latter is an effective tool to cover the 3-5 µ m range. Mid-infrared OPO especially pumped by around 1 µ m wavelength (such as Nd:YAG, Nd:YLF, Yb:YAG lasers) is more and more important with the development of growth technology of nonlinear crystals. The most important reason is that commercial Nd or Yb lasers, as a pumping source, have high output energy and good beam quality, which are widely distributed and used in mobile systems with compact design. In order to cover the ultra-broadband range of 3-5 µ m, the nonlinear crystal in OPO is required to have the large optical transmission and can be phase matched around 1 µ m. By far, commercial negative silver thiogallate crystal is one of the few crystals which can be pumped by commercially available 1.064 µ m Nd:YAG laser to achieve phase-matched down-conversion into the λ > 5 µ m region. AgGaS 2 (AGS) crystal has high nonlinear optical coefficient and high optical transmission from 0.5-12.0 µ m, which makes it realistic to generate infrared parametric radiation. That is why numerous experiments with one or multistage OPO/OPG pumped by ns and ps IR dye, Nd:YAG and another near IR solid state 1 The article is published in the original. lasers, so as by femtosecond Ti:sapphire and Cr:forsterite lasers, are carried out during last decade. Comparing with optical parametric superfluorescence, ultra-broadband tunable, mid-infrared OPO is a more challenging work due to the difficulty on its fabrication of ultrabroadband reflectivity coating.In this paper, the presented setup is a simplified version of our earlier one [7]. A coated prism as the output coupling device of OPO was used to replace the common cavity mirror. It was also functionalized a filter to separate the pump and ultra-broadband tunable idler at the same time. The problem on ultra-broadband reflectivity coating has been avoided. AgGaS 2 type-I singly resonant optical parametric oscillator (SRO OPO) with prism cavity pumped by a ns 1.064 µ m Nd:YAG laser was demonstrated experimentally. The ultra-wide tuning 2.35 to 5.27 µ m and maximum output energy 0.58 mJ per pulse at idle light were obtained.Due to the relatively low damage threshold of AGS crystal, how to lower the pump threshold was considered firstly. Threshold pump energy density is mainly determined as a function of cavity length, crystal physical length, pump spot size, pump pulse width as we discussed previously [7,11]. The influence of the parameters on th...

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AgGaS 2 optical parametric oscillator continuously tunable from 3.9 to 11.3 μm

Cited by 85 publications

References 16 publications

Narrow linewidth pulsed optical parametric oscillator

Narrow linewidth pulsed optical parametric oscillator

A continuous-wave difference-frequency generation laser operating in the mid-infrared (3–5μm) region for accurate line intensity measurements

3–5 μm AgGaS2 optical parametric oscillator with prism cavity

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