100-ps-pulse-duration, 100-J burst-mode laser for kHz–MHz flow diagnostics

Date
2014-11-01
Authors
Roy, Sukesh
Miller, Joseph
Slipchenko, Mikhail
Hsu, Paul
Mance, Jason
Meyer, Terrence
Gord, James
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Mechanical Engineering
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Abstract

A high-speed, master-oscillator power-amplifier burst-mode laser with ∼100 ps pulse duration is demonstrated with output energy up to 110 J per burst at 1064 nm and second-harmonic conversion efficiency up to 67% in a KD*P crystal. The output energy is distributed across 100 to 10,000 sequential laser pulses, with 10 kHz to 1 MHz repetition rate, respectively, over 10 ms burst duration. The performance of the 100 ps burst-mode laser is evaluated and been found to compare favorably with that of a similar design that employs a conventional ∼8 ns pulse duration. The nearly transform-limited spectral bandwidth of 0.15 cm−1 at 532 nm is ideal for a wide range of linear and nonlinear spectroscopic techniques, and the 100 picosecond pulse duration is optimal for fiber-coupled spectroscopic measurements in harsh reacting-flow environments.

Description

This article is from Optics Letters 39 (2014): 6462, doi: 10.1364/OL.39.006462. Posted with permission.

Keywords
conversion efficiency, laser diagnostics, mathematical transformations, power amplifiers, ultrashort pulses, flow environment, nonlinear spectroscopic techniques, Pico-second pulse, repetition rate, second-harmonic, spectral bandwidth
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