Tactical and Navigation Lasers-2, Compact 12mJ Mid-IR Pulsed Source Using an Intracavity KTA OPO Followed by a CSP OPA, FY20
Abstract
(U) C5ISR Centers Tactical and Navigation Lasers (TNL) applied research program is investigating and testing a new class of compact, high peak power pulsed midwave infrared and longwave infrared lasers and detectors to fulfill situational awareness within large fields of regard and extended ranges. We describe a compact mid-IR source utilizing an intracavity, non-critically phase matched potassium titanyle arsenate (KTA) optical parametric oscillator (OPO) placed inside a passively Q-switched (PQS), 1.06m Nd:YAG laser resonator. The 20mm long KTA intracavity OPO was singly resonant, with the output coupler coated for partial reflectivity of 60% at the 1.5m signal emission and for high transmission at the 3.5m idler wavelength. With the Nd:YAG pumped by a 3-lambda 12-bar diode stack at 10Hz PRF, the OPO generated a maximum 20mJ signal pulse at 1.5 micro m and 8.8mJ idler pulse at 3.5 micro m. A cadmium silicon phosphide (CSP) optical parametric amplifier (OPA), phase matched for 1.5micro m-pumped amplification of the 3.5micro m OPO idler, was placed in the near field of the intracavity OPO to further increase the mid-IR pulse energy. This document will detail the Nd:YAG pumped intracavity KTA OPO I CSP OPA and optimization of its performance for maximizing the mid-IR pulse energy. This work is critical for vehicle situational awareness systems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 09, 2020
- Accession Number
- AD1150663
Entities
People
- Brian J. Cole
- John C. Mccarthy
- John E. Nettleton
- Kevin T. Zawilski
- Leonard A. Pomeranz
- Lew Goldberg
- Peter G Schunemann