Synchronous and noncollinear infrared upconversion in AgGaS2

Bhar, G. C.; Das, S.; Chatterjee, U.; Feigelson, R. S.; Route, R. K.
April 1989
Applied Physics Letters;4/17/1989, Vol. 54 Issue 16, p1489
Academic Journal
Synchronous noncollinear upconversion detection is reported for the first time with a Nd:YAG laser in AgGaS2. Q-switched pump laser pulses with a repetition rate up to 50 Hz were synchronized with intracavity chopped continuous wave CO2 laser pulses. Results were obtained both by tuning the CO2 laser and by varying the angle between the laser beams.


Related Articles

  • Continuously variable distortion-free attenuation of high-power transversely excited atmospheric CO2 laser pulses. Sakthivel, P.; Mukherjee, P. // Review of Scientific Instruments;Nov92, Vol. 63 Issue 11, p5294 

    A new technique for the continuously variable linear attenuation of high-power transversely excited atmospheric (TEA) CO2 laser pulses is reported. The use of a binary gas mixture comprising SF6 as the absorber and helium or argon as the buffer gas causes a significant enhancement in the...

  • Time-gated gain cell for frequency-stable, single-longitudinal-mode operation of a transverse, electric, atmospheric CO2 laser. Nordstrom, R. J.; Berg, L. J.; DeSimone, A. F.; Sugimoto, N. // Review of Scientific Instruments;Jun93, Vol. 64 Issue 6, p1663 

    A time-gated gain cell has been demonstrated as a method for producing single-longitudinal-mode output from a pulsed transverse, electric, atmospheric (TEA) carbon dioxide laser. The gain cell is operated as an oscillator during the time between the laser pulses and is rapidly dropped below...

  • Clipping the tail of a TE–CO[sub 2] laser pulse using a gas breakdown technique for high resolution chemical plume detection. Bellecci, Carlo; Bellucci, Ida; Gaudio, Pasqualino; Martellucci, Sergio; Petrocelli, Giovanni; Richetta, Maria // Review of Scientific Instruments;Feb2003, Vol. 74 Issue 2, p1064 

    In this article we present the realization of a spark-induced plasma shutter, working in free atmosphere, to clip off the nitrogen tail of a TE CO[sub 2] laser source. The clipping mechanism has been tested and gain switched spike pulses ranging between 100 and 115 ns have been obtained at...

  • Direct visualization of the focal parameters of a high power CO2 laser beam. Rogozinski, K.; Scott, S. W. C.; Seguin, H. J. J. // Review of Scientific Instruments;Dec1994, Vol. 65 Issue 12, p3616 

    A diagnostic method for high power CO[sub 2] laser beams is presented. The technique features imaging of high intensity infrared radiation via the thermally induced luminosity of high velocity charcoal particles contained within an air stream. The method is particularly convenient for...

  • Variable coupling rotational wand for on-line laser beam sampling. Sellathamby, C. V.; Seguin, H. J. J.; Akitt, D. R.; Reshef, H. // Review of Scientific Instruments;Sep93, Vol. 64 Issue 9, p2482 

    As power levels of industrial lasers increase, effective determination of beam profiles over extended operational regimes becomes problematic, due to dynamic range limitations of available detectors. To address this deficiency, a variable coupling rotating wand was developed for on-line...

  • Laser surface treatment of high-phosphorus cast iron. Li, Zaiguang; Zheng, Qiguang; Li, Jiarong; Hu, Weiguang; Wang, Hansheng; Tian, Hongye // Journal of Applied Physics;11/15/1985, Vol. 58 Issue 10, p3860 

    Presents information on a study which investigated the treatment of samples of high-phosphorus cast iron using a cw carbon dioxide laser beam. Methods for laser heat treatment; Experimental details; Results and discussion; Conclusions.

  • Beam quality enhancement for a radio-frequency excited annular CO[sub 2] laser. Lapucci, A.; Ciofini, M.; Mascalchi, S.; Di Fabrizio, E.; Gentili, M. // Applied Physics Letters;11/2/1998, Vol. 73 Issue 18 

    We report the preliminary experimental results obtained from an annular radio-frequency excited CO[sub 2] laser with a Talbot cavity and a phase correcting mirror external to the cavity. The Talbot cavity is adopted in order to reduce the number of oscillating azimuthal modes. The use of the...

  • Transport of metals in Si by the thermal effect of continuous CO[sub 2] laser radiation. Shkumbatyuk, P. S. // Technical Physics;Oct99, Vol. 44 Issue 10, p1250 

    The influence of the local thermal effect of continuous CO[sub 2] laser radiation with a power density as high as 10[sup 3] W/cm[sup 2] on metal–Si films is investigated. It is discovered that the structural defects formed as a result of irradiation influence the transport of the metal in...

  • Periodic Structure Created by a CO[sub 2]-Laser Pulse Incident on an Open Water Surface. Gribin, S. V.; Komissarova, I. I.; Ostrovskaya, G. V.; Spesivtsev, B. I.; Filippov, V. N.; Shedova, E. N. // Technical Physics;Feb2000, Vol. 45 Issue 2, p205 

    Experiments on the effect of a CO[sub 2]-laser pulse on an open water surface are reported. They testify that the multilayer periodic structure of the resultant scattering region is due to the intensity modulation at the trailing edge of the pulse. The generation of optoacoustic pulses is...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics