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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 8 — Mar. 10, 2012
  • pp: 1156–1161

Photothermal self-phase-modulation technique for absorption measurements on high-reflective coatings

Jessica Steinlechner, Lars Jensen, Christoph Krüger, Nico Lastzka, Sebastian Steinlechner, and Roman Schnabel  »View Author Affiliations


Applied Optics, Vol. 51, Issue 8, pp. 1156-1161 (2012)
http://dx.doi.org/10.1364/AO.51.001156


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Abstract

We propose and demonstrate a new measurement technique for the optical absorption of high-reflection coatings. Our technique is based on photothermal self-phase modulation and exploits the deformation of cavity Airy peaks that occurs due to coating absorption of intracavity light. The mirror whose coating is under investigation needs to be the input mirror of a high-finesse cavity. Our example measurements were performed on a high-reflection SiO2Ta2O5 coating in a three-mirror ring-cavity setup at a wavelength of 1064 nm. The optical absorption of the coating was determined to be α=(23.9±2.0)·106 per coating. Our result is in excellent agreement with an independently performed laser calorimetry measurement that gave a value of α=(24.4±3.2)·106 per coating. Since the self-phase modulation in our coating-absorption measurement affects mainly the propagation through the cavity input mirror, our measurement result is practically uninfluenced by the optical absorption of the other cavity mirrors.

© 2012 Optical Society of America

OCIS Codes
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(120.6810) Instrumentation, measurement, and metrology : Thermal effects

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: November 23, 2011
Revised Manuscript: January 18, 2012
Manuscript Accepted: January 18, 2012
Published: March 8, 2012

Citation
Jessica Steinlechner, Lars Jensen, Christoph Krüger, Nico Lastzka, Sebastian Steinlechner, and Roman Schnabel, "Photothermal self-phase-modulation technique for absorption measurements on high-reflective coatings," Appl. Opt. 51, 1156-1161 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-8-1156

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