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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Schaar, J.E. Vodopyanov, K.L. Kuo, P.S. Fejer, M.M. Xiaojun Yu Lin, A. Harris, J.S. Bliss, D. Lynch, C. Kozlov, V.G. Hurlbut, W. |
| Copyright Year | 1995 |
| Abstract | We have efficiently generated tunable terahertz (THz) radiation using intracavity parametric down-conversion in gallium arsenide (GaAs). We used three types of microstructured GaAs to quasi-phase-match the interaction: optically contacted, orientation-patterned, and diffusion-bonded GaAs. The GaAs was placed in an optical parametric oscillator (OPO) cavity, and the THz wave was generated by difference-frequency mixing between the OPO signal and idler waves. The OPO used type-II phase-matched periodically poled lithium niobate as a gain medium and was synchronously pumped by a mode-locked laser at 1064 nm (7 ps and 200 nJ at 50 MHz). With center frequencies spanning 0.4-3.5 THz, 250-GHz bandwidth radiation was generated. We measured two orders of optical cascading generated by the mixing of optical and THz waves. In a doubly resonant oscillator (DRO) configuration, the efficiency increased by 21times over the singly resonant oscillator performance with an optical-to-THz efficiency of 10-4 and average THz power of 1 mW. The GaAs stabilized the DRO by a thermooptic feedback mechanism that created a quasi- continuous-wave train of THz pulses. |
| Sponsorship | IEEE Lasers and Electro-Optics Society |
| Starting Page | 354 |
| Ending Page | 362 |
| Page Count | 9 |
| File Size | 531128 |
| File Format | |
| ISSN | 1077260X |
| Volume Number | 14 |
| Issue Number | 2 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-03-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Gallium arsenide Optical feedback Optical mixing Optical pumping Oscillators Nonlinear optics Resonance Tunable circuits and devices Signal generators Frequency conversion tunable Difference-frequency mixing doubly resonant gallium arsenide (GaAs) nearly degenerate optical parametric oscillator (OPO) parametric down-conversion self-stabilized terahertz (THz) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering |
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