Journal ArticleDOI
Development of injection-seeded, pulsed optical parametric generator/oscillator systems for high-resolution spectroscopy
TLDR
In this paper, a pulsed optical parametric generator (OPG) and a near-infrared distributed feedback diode (DFD) laser are used to generate the signal of the (0, 0) vibrational band.Abstract:
We report the development and application of pulsed optical parametric generator (OPG) and optical parametric oscillator (OPO) systems that are injection seeded with near-infrared distributed feedback diode lasers. The OPG is injection seeded at the idler wavelength without the use of a resonant cavity. Two counter-rotating, beta-barium-borate (β-BBO) crystals are used in the OPG. These crystals are pumped by the third harmonic, 355-nm output of an injection-seeded Nd:YAG laser. An OPO version of the system has also been developed by placing two flat mirrors around the two β-BBO crystals to form a feedback cavity at the signal wavelength. The OPO cavity length is not actively controlled. The output signal beam from the OPG or OPO is amplified using an optical parametric amplifier (OPA) stage with four β-BBO crystals. The frequency bandwidths of the signal and idler laser radiation from OPG/OPA and OPO/OPA systems have been determined to be slightly greater than 200 MHz. The temporal pulses from each system are smooth and near-Gaussian. High-resolution optical absorption measurements of acetylene (C2H2) were performed as another check of the frequency spectrum of the idler beam. The frequency-doubled signal output of the OPO/OPA system was used to perform high-resolution, single-photon, laser-induced fluorescence (LIF) spectroscopic studies of the (0,0) vibrational band of the A
2Σ+−X
2Π electronic transition of nitric oxide (NO) at low pressure. Excellent agreement was obtained between the theory and the experiment. The signal output of the OPG/OPA system was also used for sub-Doppler, two-photon LIF spectroscopic studies of the same vibration–rotation manifold of NO.read more
Citations
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Journal ArticleDOI
Narrow-linewidth megahertz-repetition-rate optical parametric oscillator for high-speed flow and combustion diagnostics
TL;DR: The ability to generate ultra-high-frequency sequences of broadly wavelength-tunable, high-intensity laser pulses using a custom-built optical parametric oscillator pumped by the third-harmonic output of a "burst-mode" Nd:YAG laser is demonstrated.
Journal ArticleDOI
Advances in generation of high-repetition-rate burst mode laser output
TL;DR: In this article, the authors demonstrated that the incorporation of variable pulse duration flashlamp power supplies into an Nd:YAG burst mode laser system results in very substantial increases in the realizable energy per pulse, the total pulse train length, and uniformity of the intensity envelope.
Journal ArticleDOI
Neutrino spectroscopy with atoms and molecules
Atsushi Fukumi,Susumu Kuma,Yuki Miyamoto,Kyo Nakajima,Itsuo Nakano,Hajime Nanjo,Chiaki Ohae,Noboru Sasao,Minoru Tanaka,Takashi Taniguchi,Satoshi Uetake,Tomonari Wakabayashi,Takuya Yamaguchi,Akihiro Yoshimi,Motohiko Yoshimura +14 more
TL;DR: In this article, the authors systematically investigate the new experimental method of using atoms or molecules to measure neutrinos that are still to be determined: the absolute mass scale, the mass hierarchy pattern (normal or inverted), the neutrino mass type (Majorana or Dirac), and the CP-violating phases, including Majorana phases.
Journal ArticleDOI
Pressure, Temperature, and Velocity Measurements in Underexpanded Jets Using Laser-Induced Fluorescence Imaging
TL;DR: In this article, measurements of pressure, temperature, and velocity in an underexpanded jet using planar laser-induced fluorescence of nitric oxide were obtained by tuning the frequency of the laser radiation over the absorption line.
Journal ArticleDOI
Ultra-high-speed pumping of an optical parametric oscillator (OPO) for high-speed laser-induced fluorescence measurements
TL;DR: In this article, the feasibility of using an OPO with an ultra-high repetition rate multi-YAG laser system, producing a burst of up to eight high-energy pulses, has been investigated.
References
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Journal ArticleDOI
Accurate optical frequency atlas of the 1.5-µm bands of acetylene
TL;DR: In this paper, the absolute optical frequencies of 90 rovibrational lines of the 12C2H2 and 13C 2H2 1.5µm bands with an uncertainty of ∼10-9.
Journal ArticleDOI
Visible BaB2O4 optical parametric oscillator pumped at 355 nm by a single‐axial‐mode pulsed source
TL;DR: In this paper, a visible BaB2O4 optical parametric oscillator (OPO) pumped by a single-axial-mode 355-nm source has been demonstrated.
Journal ArticleDOI
Comparison of a numerical model with measured performance of a seeded, nanosecond KTP optical parametric oscillator
TL;DR: In this article, a numerical model of seeded optical parametric oscillators that is appropriate for nanosecond or longer pulsed operation was constructed and compared with the observed oscillator performance.
PatentDOI
Frequency control of a pulsed parametric oscillator by radiation injection
TL;DR: In this paper, a singly resonant optical parametric oscillator (SRO) is used to tune a high power, pulsed source and tune it to a predetermined desired frequency, and radiation of that frequency is injected into a mode of the SRO from a stabilized, low power injection source.
Journal ArticleDOI
Measurement of the self-broadening of the H2 Q(0-5) Raman transitions from 295 to 1000 K.
TL;DR: Three models for the {ital J} dependence of the pure-vibrational dephasing are discussed and it is found that models with little or no {ital Q} dependence in the pure -vibrations are preferred.