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Optical Engineering

Compact sources for eyesafe illumination
Author(s): Nadia Baranova; Rui Pu; Kenneth Stebbins; Ilya Bystryak; Michael Rayno; Kevin Ezzo; Christopher DePriest
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Paper Abstract

Q-peak has demonstrated a compact, pulsed eyesafe laser architecture operating with <10  mJ pulse energies at repetition rates as high as 160 Hz. The design leverages an end-pumped solid-state laser geometry to produce adequate eyesafe beam quality (M2∼4), while also providing a path toward higher-density laser architectures for pulsed eyesafe applications. The baseline discussed in this paper has shown a unique capability for high-pulse repetition rates in a compact package, and offers additional potential for power scaling based on birefringence compensation. The laser consists of an actively Q-switched oscillator cavity producing pulse widths <30  ns, and utilizing an end-pumped Nd:YAG gain medium with a rubidium titanyl phosphate electro-optical crystal. The oscillator provides an effective front-end-seed for an optical parametric oscillator (OPO), which utilizes potassium titanyl arsenate in a linear OPO geometry. This laser efficiently operates in the eyesafe band, and has been designed to fit within a volume of 3760  cm3. We will discuss details of the optical system design, modeled thermal effects and stress-induced birefringence, as well as experimental advantages of the end-pumped laser geometry, along with proposed paths to higher eyesafe pulse energies.

Paper Details

Date Published: 12 September 2017
PDF: 5 pages
Opt. Eng. 57(2) 021202 doi: 10.1117/1.OE.57.2.021202
Published in: Optical Engineering Volume 57, Issue 2
Show Author Affiliations
Nadia Baranova, Q-Peak, Inc. (United States)
Rui Pu, Celera Motion (United States)
Kenneth Stebbins, Q-Peak, Inc. (United States)
Ilya Bystryak, Q-Peak, Inc. (United States)
Michael Rayno, Q-Peak, Inc. (United States)
Kevin Ezzo, Q-Peak, Inc. (United States)
Christopher DePriest, Q-Peak, Inc. (United States)

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