Download or read book Studies of Optical Parametric Oscillators for the Ultraviolet and Visible Spectral Regions written by Angus Henderson and published by . This book was released on 1993 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Studies on Tunable Optical Parametric Oscillators written by Stanford University Ginzton Laboratory and published by . This book was released on 1976 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary goal of this contract is research studies of tunable optical sources, and the development of coherent sources in new spectral regions. In particular, a major project this year has been IR image up-conversion based on three frequency summing in metal vapors. A general theory of the efficiency of these up-converters as a function of the pump laser spectrum, detuning, and linewidth, and of the linewidth of the selected non-allowed atomic transition has been developed. (Author).

Download or read book Research Studies on Tunable Optical Parametric Oscillators Quarterly Status Report No 5 written by Stanford University. Microwave Laboratory and published by . This book was released on 1971 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Studies on Tunable Optical Parametric Oscillators Quarterly Status Report No 1 written by Stanford University. Microwave Laboratory and published by . This book was released on 1973 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Studies on Tunable Optical Parametric Oscillators Quarterly Status Report No 2 written by Stanford University. Microwave Laboratory and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Parametric Oscillator Research written by E. O. Ammann and published by . This book was released on 1970 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the research was to investigate techniques for extending the tuning range of optical parametric oscillators further into (a) the infrared and (b) the visible and ultraviolet. Two separate tasks are discussed. The first is an experimental and theoretical study of a proustite oscillator which is pumped by the 1.06 micron output of a Nd:YAG laser, and the second a study of an ammonium dihydrogen phosphate (ADP) oscillator which is pumped by the frequency-quadrupled output from a Nd:YAG laser. The report summarizes the results of work on these tasks. A proustite optical parametric oscillator has been designed, built, and successfully operated. The oscillator operates near degeneracy with signal and idler outputs near 2.13 microns. Also completed was the design of an oscillator which is pumped by the fourth harmonic of the 1.06 micron output from a Nd:YAG laser. ADP has been selected as the nonlinear material, and an optimum crystal orientation established. Calculations have been carried out on temperature-tuning of the oscillator, and of the pump power required to reach threshold. A unique oscillator resonator design has been devised which will eliminate the need for coatings which can withstand the substantial ultraviolet pump power densities involved. (Author).

Download or read book Research Studies on Tunable Optical Parametric Oscillators Quarterly Status Report No 10 written by Stanford University. Microwave Laboratory and published by . This book was released on 1972 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Studies on Tunable Optical Parametric Oscillators Quarterly Status Report No 8 written by Stanford University. Microwave Laboratory and published by . This book was released on 1971 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Studies on Tunable Optical Parametric Oscillators Quarterly Status Report No 7 written by Stanford University. Microwave Laboratory and published by . This book was released on 1971 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Studies on Tunable Optical Parametric Oscillators Quarterly Status Report No 3 written by Stanford University. Microwave Laboratory and published by . This book was released on 1973 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Studies on Tunable Optical Parametric Oscillators Quarterly Status Report No 11 written by Stanford University. Microwave Laboratory and published by . This book was released on 1972 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Studies on Tunable Optical Parametric Oscillators Quarterly Status Report No 4 written by Stanford University. Microwave Laboratory and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Enhanced Sensitivity Infrared Laser Spectroscopy Techniques Applied to Reactive Plasmas and Trace Gas Detection written by Stefan Welzel and published by Logos Verlag Berlin GmbH. This book was released on 2009 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared laser absorption spectroscopy (IRLAS) employing both tuneable diode and quantum cascade lasers (TDLs, QCLs) has been applied with both high sensitivity and high time resolution to plasma diagnostics and trace gas measurements. TDLAS combined with a conventional White type multiple pass cell was used to detect up to 13 constituent molecular species in low pressure Ar/H2/N2/O2 and Ar/CH4/N2/O2 microwave discharges, among them the main products such as H2O, NH3, NO and CO, HCN respectively. The hydroxyl radical has been measured in the mid infrared (MIR) spectral range in-situ in both plasmas yielding number densities of between 1011 ... 1012 cm-3. Strong indications of surface dominated formation of either NH3 or N2O and NO were found in the H2-N2-O2 system. In methane containing plasmas a transition between deposition and etching conditions and generally an incomplete oxidation of the precursor were observed. The application of QCLs for IRLAS under low pressure conditions employing the most common tuning approaches has been investigated in detail. A new method of analysing absorption features quantitatively when the rapid passage effect is present is proposed. If power saturation is negligible, integrating the undisturbed half of the line profile yields accurate number densities without calibrating the system. By means of a time resolved analysis of individual chirped QCL pulses the main reasons for increased effective laser line widths could be identified. Apart from the well-known frequency down chirp non-linear absorption phenomena and bandwidth limitations of the detection system may significantly degrade the performance and accuracy of inter pulse spectrometers. The minimum analogue bandwidth of the entire system should normally not fall below 250 MHz. QCLAS using pulsed lasers has been used for highly time resolved measurements in reactive plasmas for the first time enabling a time resolution down to about 100 ns to be achieved. A temperature increase of typically less than 50 K has been established for pulsed DC discharges containing Ar/N2 and traces of NO. The main NO production and depletion reactions have been identified from a comparison of model calculations and time resolved measurements in plasma pulses of up to 100 ms. Considerable NO struction is observed after 5 ... 10 ms due to the impact of N atoms. Finally, thermoelectrically cooled pulsed and continuous wave (cw) QCLs have been employed for high finesse cavity absorption spectroscopy in the MIR. Cavity ring down spectroscopy (CRDS) has been performed with pulsed QCLs and was found to be limited by the intrinsic frequency chirp of the laser suppressing an efficient intensity build-up inside the cavity. Consequently the accuracy and advantage of an absolute internal absorption calibration is not achievable. A room temperature cw QCL was used in a complementary cavity enhanced absorption spectroscopy (CEAS) configuration which was equipped with different cavities of up to 1.3 m length. This spectrometer yielded path lengths of up to 4 km and a noise equivalent absorption down to 4 x 10-8 cm-1Hz-1/2. The corresponding molecular concentration detection limit (e.g. for CH4, N2O and C2H2 at 1303 cm-1/7.66 Aem) was generally below 1 x 1010 cm-3 for 1 s integration times and one order of magnitude less for 30 s integration times. The main limiting factor for achieving even higher sensitivity is the residual mode noise of the cavity. Employing a 0.5 m long cavity the achieved sensitivity was good enough for the selective measurement of trace atmospheric constituents at 2.2 mbar.

Download or read book Ultraviolet Spectroscopy And Uv Lasers written by Prabhakar Misra and published by CRC Press. This book was released on 2002-02-25 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a complete and thorough examination of advances in the instrumentation, evaluation, and implementation of UV technology for reliable and efficient data acquisition and analysis. It provides real-world applications in expanding fields such as chemical physics, plasma science, photolithography, laser spectroscopy, astronomy and a

Download or read book Research Studies on Tunable Optical Parametric Oscillators Quarterly Status Report No 9 written by Stanford University. Microwave Laboratory and published by . This book was released on 1972 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Studies on Optical Parametric Oscillation written by Stephen E. Harris and published by . This book was released on 1969 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The general areas which were studied during the contract period were: The use of cw gas lasers to make cw optical parametric oscillators; ruby pumped noncollinear oscillators; spontaneous parametric emission; phase locked parametric oscillators; the use of the 0.946 micrometer line in Nd:YAG as an oscillator pump; and most recently, a novel method to lock the output of an optical parametric oscillator to an atomic transition. (Author).