Q-switched slab RF discharge CO laser

Abstract

A compact repetitively pulsed cryogenically cooled slab RF discharge CO laser with double path V-type laser resonator equipped with external Q-switching system based on rotating mirror was developed and studied. The laser produced mid-IR (λ ~ 5-7 µm) radiation pulses of ~1 ÷ 2 µs duration (FWHM), peak power up to ~3 kW, and pulse repetition rate up to 130 Hz. Averaged output laser power reached 0.5 W, the laser spectrum consisted of ~80 laser lines with individual peak power up to 80 W.

Compact Radio Frequency Discharge-Pumped Slab CO Laser System with a Zinc Germanium Phosphide (ZnGeP2) Sum-Frequency Generator for Remote Sensing of the Atmosphere

“…In this paper, the second harmonics (SHG) and sum-frequencies generation (SFG) spectra, which can be obtained by intracavity frequency conversion of existing laser systems, 10,11 are calculated numerically (Fig. 2).…”

“…Lebedev Physical Institute. [10][11][12][13] The lasers have slab geometry of the discharge gap, in which the active medium is excited by a capacitive radio frequency (RF) discharge. The advantages of this laser configuration are compactness and absence of highvoltage power supply, which is attractive for outdoor application.…”

“…1a). 10 It is also possible to implement a selective operation mode, in which the generation of short pulses occurs on a single spectral line with tuning possibility through 86 rotational-vibrational transitions in the wavelength range of 5.0-6.4 μm (Fig. 1b).…”

Sum frequency generation under conversion of Q-switched cryogenic slab RF discharge CO laser radiation in ZnGeP2

“…Short high-power laser pulses can be obtained by Q-switching. Q-switching of a compact cryogenic slab RF discharge CO laser was studied in [15] at various parameters of its active medium and laser cavity. The purpose of this work is the experimental study of broadband sum frequency conversion (including second harmonic generation as a particular case) of this Q-switched compact cryogenic slab RF discharge CO laser radiation in ZnGeP 2 crystal.…”

THz sources based on frequency conversion of multi-line molecular lasers in nonlinear crystals and on optically pumped molecular lasers

“…Within the framework of this project, it is planned to use laser systems that will be developed on the basis of existing laser devices pumped with an active medium by a pulsed electron beam sustained discharge [11], a pulsed-periodic RF discharge [12] and a DC discharge [13]. In addition, the members of EPJ Web of Conferences 195, 03004 (2018) https://doi.org/10.1051/epjconf/201819503004 TERA-2018 the scientific team have experience in the implementation Q-switching modes and of the active mode-locking of molecular CO [14] and CO 2 lasers [15].…”