Topic
Parametric oscillator
About: Parametric oscillator is a research topic. Over the lifetime, 5836 publications have been published within this topic receiving 95631 citations. The topic is also known as: Parametric excitation.
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31 citations
TL;DR: Using the orbital angular momentum (OAM) conservation of the parametric processes and the threshold conditions of the cavity modes of the singly resonant optical parametric oscillator (SRO), the OAM of the pump beam at the near-infrared wavelength is transferred to the idler beam tunable in the mid-IR.
Abstract: We report on a high-power, continuous-wave source of optical vortices tunable in the mid-infrared (mid-IR) wavelength range. Using the orbital angular momentum (OAM) conservation of the parametric processes and the threshold conditions of the cavity modes of the singly resonant optical parametric oscillator (SRO), we have transferred the OAM of the pump beam at the near-infrared wavelength to the idler beam tunable in the mid-IR. Pumped with a vortex beam of order lp=1 at 1064 nm, the SRO, configured in a four curved mirror-based ring cavity with a 50 mm long MgO-doped periodically poled LiNbO3 crystal, produces an idler beam with an output power in excess of 2 W in a vortex spatial profile with the order li=1, tunable across 2217–3574 nm and corresponding signal beam in Gaussian intensity distribution across 1515–2046 nm. For pump vortices of the order lp=1 and 2, and a power of 22 W, the SRO produces idler vortices of the same order as that of the pump beam with a maximum power of 5.23 and 2.3 W, corresponding to near-IR to mid-IR vortex conversion efficiency of 23.8% and 10.4%, respectively. The idler vortex beam has a spectral width, and a passive rms power stability of 101 MHz and 4.9% over 2 h, respectively.
31 citations
TL;DR: In this article, the authors discuss recent progress in the study of the nonclassical properties of light beams generated by non-degenerate parametric splitting in χ(2) nonlinear birefringent crystals, with special emphasis on their quantum correlation.
Abstract: We discuss recent progress in the study of the non-classical properties of light beams generated by non-degenerate parametric splitting in χ(2) nonlinear birefringent crystals, with special emphasis on their quantum correlation (“twin beams”). We describe experimental results using successively pure parametric fluorescence, parametric amplification of a weak signal beam pumped by a pulsed laser, and parametric oscillation in a cavity pumped by a cw laser. In this review, we compare the respective advantages and drawbacks of the different approaches.
30 citations
09 Feb 2003
TL;DR: In this paper, an amplifier based on a little-known effect in MOS capacitors is proposed, where a voltage sampled on the gate rises when the channel charge is pulled out.
Abstract: Experimental results are reported for an amplifier based on a little-known effect in MOS capacitors: a voltage sampled on the gate rises when the channel charge is pulled out. It is demonstrated that this phenomenon can be used to provide micro-power, low-gain, and low-noise signal amplification.
30 citations
TL;DR: In this paper, a nonlinear fiber compression experiment with high-power femtosecond pulses from a passively mode-locked thin disk Yb:YAG laser is described.
Abstract: We report on nonlinear experiments pumped with high-power femtosecond pulses from a passively mode-locked thin disk Yb:YAG laser: a nonlinear fiber compression experiment, generating 33-fs pulses with 18 W average power and a fiber-feedback parametric oscillator generating 19 W of signal power in the 1.5-?m region and 7.8 W of idler power at a wavelength of 3.57 ?m.
30 citations