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Proceedings Paper

A High Pulse Repetition Frequencies (PRF) Narrow Pulse Nd:YAG lAser Using An Improved Pulse Transmission Mode (PTM) Modulation Technique
Author(s): E.Michael Ward
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Paper Abstract

The electro-optical (E-0) community has long sought a neodymium doped yttrium aluminum garnet (Nd:YAG) laser system that provides short duration pulses and high peak powers at repetition frequencies in excess of 10 kilohertz (kHz). Previous attempts to develop such a laser implemented Pulse Transmission Mode (PTM) modulation using E-0 modulators. Because of insertion loses, these modulators were adversely affected by high average powers. A new approach to implementing the PTM technique has been investigated using a combination of an Acousto-Optic (A-0) and a Frustrated Total Internal Reflectance (FTIR) modulator. These devices were selected because their operation is independent of the direction of polarization of the laser energy and they provide a low insertion loss. The new PTM configuration provided significant increases in peak power and a reduction in pulsewidth in comparison to conventional A-0 Q-switching. Preliminary laboratory tests indicated that, if the FTIR can be optimized for PTM operation, narrow pulsewidths at high pulse repetition frequencies (PRF) can be obtained from an Nd:YAG resonator.

Paper Details

Date Published: 31 October 1980
PDF: 6 pages
Proc. SPIE 0247, Advances in Laser Engineering and Applications, (31 October 1980); doi: 10.1117/12.959390
Show Author Affiliations
E.Michael Ward, Office of the Test Director, Joint Services Electro-Optical Guided Weapons Countermeasures Test Prog (United States)


Published in SPIE Proceedings Vol. 0247:
Advances in Laser Engineering and Applications
Malcolm L. Stitch, Editor(s)

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