Accession Number:

ADA576334

Title:

Efficient Parametric Terahertz Generation in Quasi-Phase-Matched GaP through Cavity Enhanced Difference-Frequency Generation

Descriptive Note:

Journal article

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH

Personal Author(s):

• Petersen, Eliot B.
• Shi, Wei
• Chavez-Pirson, Arturo
• Peyghambarian, N.
• Cooney, Adam T.

Report Date:

2011-03-25

Pagination or Media Count:

4.0

Abstract:

We report an efficient parametric terahertz THz source by using bonded quasi-phase-matched QPM GaP crystals pumped by the C-band pulsed fiber lasers in a master oscillator power amplifier configuration, based on difference frequency generation DFG. We observed that the QPM-GaP crystals can effectively increase the THz generation power and efficiency by increasing the number of periods. Moreover, we observed external cavity enhanced THz DFG by placing the QPM-GaP crystal in an external ring cavity. The THz cavity enhancement factor of approximately 250 has been achieved in comparison with a single-pass THz DFG. The maximum THz average power can reach 339 microW, corresponding to a power conversion efficiency of 2.43 x 10expn 4 and a quantum efficiency of 3.16.

Descriptors:

• *GALLIUM PHOSPHIDES
• *QUANTUM EFFICIENCY
• CRYSTALS
• LASERS

Subject Categories:

• Inorganic Chemistry
• Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE