CHAPS: a new precision laser-spectroscopic technique

Kono, Mitsuhiko; Baldwin, K. G. H.; He, Yabai; White, Richard; Orr, Brian J.

doi:10.1364/josab.23.001181

Cited by 12 publications

(13 citation statements)

References 21 publications

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“…In a related context, Anstett and Wallenstein [8] have measured spectrotemporal dynamics in a short-cavity pulsed OPO, and discussed their results in terms of the classic simulations of Cassedy and Jain [19]. In Subsections 3.A, 3.B, and 3.C we consider specific results that entail a comparison of our previously reported measurements [1,3,4,10,11] with our more recent simulations.…”

Section: Numerical Simulationmentioning

confidence: 87%

“…The ϳ10 J signal pulses can be amplified by a birefringently phase-matched LiNbO 3 optical parametric amplifier, pumped by the same Nd: YAG laser. An OH detection system and a FT analysis technique [2,3] allow us to record the instantaneous optical frequency profile, f inst ͑t͒, of each pulse, thereby facilitating spectroscopic measurements that require low frequency chirp (e.g., as in our recent CHAPS studies [10,11]). Figure 1 shows a computer screen dump of the front end of the interactive real-time FT chirp analysis software that we have developed for experimental convenience since our earlier papers [1][2][3].…”

Section: Instrumentationmentioning

confidence: 99%

“…Also, under certain conditions (excessive pump-pulse energy and/or ⌬k), seeding is found to fail partway through the output pulse, such that operation on multiple longitudinal modes ensues [3,4]. Incidentally, our ability to monitor frequency chirp and pulse-topulse fluctuations in the central frequency of the SLM output from such an OPO system has resulted in a new form of sub-Doppler spectroscopy: coherent heterodyneassisted pulsed spectroscopy (CHAPS) [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…This paper is the third in a series [2,3] on characterization of the instantaneous frequency of output from our high-performance pulsed OPO system, based on a QPM NLO medium [3,4,[10][11][12]. Here we present new tempo-rally resolved computer simulations of the spectroscopic performance of this OPO system.…”

Section: Introductionmentioning

confidence: 99%

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Control of frequency chirp in nanosecond-pulsed laser spectroscopy 3 Spectrotemporal dynamics of an injection-seeded optical parametric oscillator

White¹,

Orr

et al. 2007

J. Opt. Soc. Am. B

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Section: Numerical Simulationmentioning

confidence: 87%

Section: Instrumentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Control of frequency chirp in nanosecond-pulsed laser spectroscopy 3 Spectrotemporal dynamics of an injection-seeded optical parametric oscillator

White¹,

Orr

et al. 2007

J. Opt. Soc. Am. B

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“…Additionally, shot-to-shot variations in the temporal profile and frequency chirp due to instantaneous variations in output frequency during the pulse may further increase the optical bandwidth. 37,38,64 Chirp effects are minimized by reducing the pump energy and keeping the freerunning wavelength of the phase-matched OPO as close as possible to the seeding wavelength. We also obtained experimentally derived information on the efficiency of specific key wavelength conversion steps in the OPO-based system.…”

Section: ͑4͒mentioning

confidence: 99%

Generation of tunable narrow bandwidth nanosecond pulses in the deep ultraviolet for efficient optical pumping and high resolution spectroscopy

Velarde

Engelhart

Matsiev

et al. 2010

Review of Scientific Instruments

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Generation of programmable near-Fourier-transform-limited pulses of narrow-band laser radiation from the near infrared to the vacuum ultraviolet Rev. Sci. Instrum. 76, 103103 (2005) Nanosecond optical pulses with high power and spectral brightness in the deep ultraviolet ͑UV͒ region have been produced by sum frequency mixing of nearly transform-limited-bandwidth IR light originating from a home-built injection-seeded ring cavity KTiOPO 4 optical parametric oscillator ͑OPO͒ and the fourth harmonic beam of an injection-seeded Nd:YAG laser used simultaneously to pump the OPO with the second harmonic. We demonstrate UV output, tunable from 204 to 207 nm, which exhibits pulse energies up to 5 mJ with a bandwidth better than 0.01 cm −1 . We describe how the approach shown in this paper can be extended to wavelengths shorter than 185 nm. The injection-seeded OPO provides high conversion efficiency ͑Ͼ40% overall energy conversion͒ and superior beam quality required for highly efficient downstream mixing where sum frequencies are generated in the UV. The frequency stability of the system is excellent, making it highly suitable for optical pumping. We demonstrate high resolution spectroscopy as well as optical pumping using laser-induced fluorescence and stimulated emission pumping, respectively, in supersonic pulsed molecular beams of nitric oxide.

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InfraredLIDARApplications in Atmospheric Monitoring

Orr

2017

Encyclopedia of Analytical Chemistry

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The acronym LIDAR stands for LIght Detection And Ranging, an optical analog of RADAR (RAdio Detection And Ranging). The conventional version of LIDAR requires a laser transmitter to launch short pulses of coherent light, which are scattered from atmospheric targets of interest back to an optical receiver, with a time delay that is determined by the range of the target. Optical phenomena in the Earth's atmosphere (e.g. Rayleigh scattering, Raman scattering, Mie scattering, refraction, and resonant absorption) contribute to the amplitude of optical signals returning to the receiver and their characteristic wavelength dependence allows us to measure the concentration and velocity distributions of different atmospheric molecules and aerosol particles. LIDAR backscattering in the infrared (IR) region, on which this article concentrates, is well suited to detecting aerosols (as in clouds or industrial particulate emissions). IR DIAL (DIfferential Absorption Lidar), a variant in which two or more wavelengths are used simultaneously to separate resonant molecular signals from background, enables many molecular species to be monitored by means of their IR absorption spectra. Closely related approaches comprise long‐path IR laser absorption and IPDA (Integrated Path Differential Absorption), with retroreflection from a topographic target (e.g. a strategically located mirror or a hard target, such as the ground in air‐borne applications); these approaches sacrifice optical range information but gain sensitivity because they integrate over all molecules in the optical column between the transmitter/receiver and the reflector or hard target. All of these techniques are vitally dependent on pulsed IR laser technology.

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CHAPS: a new precision laser-spectroscopic technique

Cited by 12 publications

References 21 publications

Control of frequency chirp in nanosecond-pulsed laser spectroscopy 3 Spectrotemporal dynamics of an injection-seeded optical parametric oscillator

Control of frequency chirp in nanosecond-pulsed laser spectroscopy 3 Spectrotemporal dynamics of an injection-seeded optical parametric oscillator

Generation of tunable narrow bandwidth nanosecond pulses in the deep ultraviolet for efficient optical pumping and high resolution spectroscopy

InfraredLIDARApplications in Atmospheric Monitoring

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