Initial measurements using a 154-μm eyesafe Raman shifted lidar

Patterson, E. M.; Roberts, David W.; Gimmestad, Gary G.

doi:10.1364/ao.28.004978

Cited by 27 publications

(8 citation statements)

References 1 publication

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“…Several types of laser have been applied to meet these demands. Stimulated Raman scattering in high-pressure methane has been used 5,13 to convert the fundamental wavelength of an Nd:YAG laser (1.064 µm) to the more eye-safe 1.54 µm. However, solid-state devices are preferable for field use as they avoid the need to handle methane and are not limited in wavelength tuning by the Raman spectrum of the gas.…”

Section: Choice Of Laser Technologymentioning

confidence: 99%

A flexible eye-safe lidar instrument for elastic-backscatter and DIAL

et al. 2012

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Section: Choice Of Laser Technologymentioning

confidence: 99%

A flexible eye-safe lidar instrument for elastic-backscatter and DIAL

et al. 2012

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“…The eye-safe lasers around 1.5 µm are of great importance for such kinds of potential applications, such as optical communications, optical sensing, lidar, and medicine [1][2][3]. Usually, only limited wavelengths can be generated directly by the gain media due to their fixed energy-level structures.…”

Section: Introductionmentioning

confidence: 99%

Diode-Pumped Actively Q-Switched Nd:YVO4/RTP Intracavity Raman Laser at 1.49 µm

et al. 2019

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For the first time, a diode-pumped actively Q-switched Nd:YVO4/RbTiOPO4 (RTP) intracavity Raman laser at 1.49 µm was demonstrated to the best of our knowledge. Experimentally, a dual-end diffusion-bonded YVO4–Nd:YVO4–YVO4 crystal was employed as the laser medium to generate 1.34 µm laser radiation, and an RTP crystal as the Raman medium to enable the frequency conversion, by which radiation at 1.49 µm was achieved successfully. With an incident pump power of 10.4 W, an average output power of 502 mW was obtained at a pulse repetition rate of 15 kHz, corresponding to a conversion efficiency of 4.8%.

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“…Flash-lamp-pumped rare-earth (Ho, Tm, Cr, Er, and Nd)-doped lasers and their nonlinear frequency-conversion techniques were developed and used in lidar systems. [3][4][5][6][7][8][9] Or TEA-CO 2 lasers have been used as a transmitter in lidar systems exceeded 9 µm 10, 11 , continuous tenability, however, is not achieved because of discontinuous emission spectrum of CO 2 . Optical parametric oscillation (OPO) is required to accomplish high-energy (10 mJ) pulsed oscillation in a broad mid-infrared wavelength range using a tunable high-energy pulsed laser.…”

Section: Introductionmentioning

confidence: 99%

All-solid-state rapidly tunable coherent 6-10 μm light source for lidar environmental sensing

et al. 2012

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We report on an all-solid-state rapidly tunable pulsed coherent 6-10 µm light source achieved in an optical parametric oscillator (OPO) pumped with an electronically tuned Cr:ZnSe laser and its application to lidar remote sensing for environmental detection. The Cr:ZnSe laser was pumped with a Tm:YAG laser operated at a repetition rate of 10 Hz. An acousto-optic tunable filter as a tuning element was used in the Cr:ZnSe laser cavity. We obtained the tuning range from 2.12 to 2.67 µm in the Cr:ZnSe laser with change in radio frequency from 45.5 to 36.0 MHz. The wavelength was tuned every pulse shot at an operated frequency in the Tm:YAG laser. The Cr:ZnSe laser was used as a pump source in an OPO. A nonlinear optical crystal was fixed at a phase-matched angle in the OPO cavity. The signal and idler waves emitted from the OPO were rapidly tuned in the range from 6 to 10 µm by tuning the Cr:ZnSe laser without mechanical rotation of dispersive optical elements. A maximum output energy of 10 mJ can be expected near 7.0 µm. We designed a lidar system using the 6-10 µm light source and a telescope with a primary mirror of 50 cm and a high-efficient HgCdTe detector. The lidar system would be a valuable system in the measurement of chemical agents in the 100-300 m.

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Initial measurements using a 154-μm eyesafe Raman shifted lidar

Cited by 27 publications

References 1 publication

A flexible eye-safe lidar instrument for elastic-backscatter and DIAL

A flexible eye-safe lidar instrument for elastic-backscatter and DIAL

Diode-Pumped Actively Q-Switched Nd:YVO4/RTP Intracavity Raman Laser at 1.49 µm

All-solid-state rapidly tunable coherent 6-10 μm light source for lidar environmental sensing

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