Accession Number : ADA348615


Title :   Synchronously Pumped Optical Parametric Oscillator with Intracavity Difference Frequency Mixing


Descriptive Note : Doctoral thesis


Corporate Author : NEW MEXICO UNIV ALBUQUERQUE


Personal Author(s) : Dearborn, Michael E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a348615.pdf


Report Date : 29 Jun 1998


Pagination or Media Count : 175


Abstract : In this work we experimentally investigate a singly resonant optical parametric oscillator (OPO) with an intracavity crystal that mixes the signal and idler waves, enhancing the power conversion efficiency of the idler radiation. Optical parametric oscillators provide a method for producing coherent tunable radiation from a coherent fixed-frequency pump source. The pump frequency Wp 15 converted to the signal and idler frequencies Ws and Wi, respectively, in the OPO interaction, Wp = Ws + Wi, Ws Wi. Since the signal and idler frequencies sum to the incident pump frequency, they are always lower than the pump frequency. Extra-cavity difference-frequency mixing (DFM) of the signal and idler from an OPO was demonstrated in some early experiments and recently a number of investigators have examined mixing the signal and idler waves generated from a synchronously pumped OPO to produce long-wavelength difference-frequency radiation. Here the difference-frequency Wd is produced in the DFM interaction, Wd = Ws - Wi. The DFM process not only produces long-wavelength radiation at the difference frequency, but for each difference-frequency photon produced, another idler photon is produced. Thus, this technique also increases the idler-frequency conversion efficiency. Production of the long-wavelength difference-frequency photons may not be possible in a single-step OPO process, due to transmission bands and phase-matching limitations of available crystals and available pump wavelengths.


Descriptors :   *CRYSTAL OSCILLATORS , *OPTICAL PUMPING , COHERENT OPTICAL RADIATION , DYNAMIC RANGE , INTERMEDIATE INFRARED RADIATION , LITHIUM NIOBATES , LONG WAVELENGTHS , NONLINEAR OPTICS , PHOTONS , PHOTOREFRACTIVE MATERIALS , PLANE WAVES , THESES , WAVE EQUATIONS


Subject Categories : Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE