Brian J. Orr is an Australian scientist known for his contributions to laser spectroscopy and optical parametric oscillators. He graduated with a BSc (Hons I) from the University of Sydney. Orr received his PhD from the University of Bristol and was a professor at the University of New South Wales prior to his professorship appointment at the Faculty of Science of Macquarie University.[citation needed]

Laser spectroscopy

Orr has performed a wide variety of spectroscopic research and is the author, or co-author, of numerous refereed publications. His research career began on diatomic molecular spectroscopy.[1] Back in Australia his research focused mainly on laser infrared–ultraviolet double resonance spectroscopy.[2][3]

More recently his research has expanded towards the development of tunable coherent sources, in particular optical parametric oscillators for spectroscopy, medicine, and other applications.[4][5][6] Orr's overall research activities may be summarized by the Optical Society's citation to the 2004 W. F. Meggers Award: "for advancing molecular spectroscopy by experiment and theory on infrared- and Raman-ultraviolet double resonance, coherent Raman spectroscopy, cavity ringdown spectroscopy, photoelectron spectroscopy, nonlinear optics, and tunable coherent light sources."



  1. ^ A. D. Buckingham, B. J. Orr, J. M. Sichel, Angular distribution and intensity in molecular photoelectron spectroscopy I. General theory for diatomic molecules, Phil. Transac. R. Soc. A. 268, 147-157 (1970).
  2. ^ C. P. Bewick, A. B. Duval, and B. J. Orr, Rotationally selective mode‐to‐mode vibrational energy transfer in D2CO/D2CO and D2CO/Ar collisions, J. Chem Phys. 82, 3470 (1985).
  3. ^ C. P. Bewick and B. J. Orr, Rotationally specific mode-to-mode vibrational energy transfer in D2CO/D2CO collisions. I. Spectroscopic aspects, J. Chem Phys. 93, 8634-8642 (1990).
  4. ^ J. G. Haub, M. J. Johnson, B. J. Orr, and R. Wallenstein, Continuously tunable, injection‐seeded β‐barium borate optical parametric oscillator: Spectroscopic applications, Appl. Phys. Lett. 58, 1718 (1991).
  5. ^ Y. He and B. J. Orr, Ringdown and cavity-enhanced absorption spectroscopy using a continuous-wave tunable diode laser and a rapidly swept optical cavity, Chem. Phys. Lett. 319, 131–137( 2000).
  6. ^ Orr BJ, Haub JG, He Y, White RT (2016). "Spectroscopic Applications of Pulsed Tunable Optical Parametric Oscillators". In Duarte FJ (ed.). Tunable Laser Applications (3rd ed.). Boca Raton: CRC Press. pp. 17–142. ISBN 9781482261066.

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