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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 24 — Aug. 20, 2007
  • pp: 6210–6217

Study on the quality of interference fringes from a pulsed UV source for application in a biprism based fiber Bragg grating writing

Om Prakash, Ramakanta Mahakud, Ramakanta Biswal, Shrikanth Gurram, Harilal S. Vora, and Sudhir K. Dixit  »View Author Affiliations

Applied Optics, Vol. 46, Issue 24, pp. 6210-6217 (2007)

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This paper presents a study on the quality of interference fringes formed from a pulsed UV ( 255   nm , 5.6   kHz , and 40   ns ) source for an application in writing fiber Bragg gratings (FBGs). The interference fringes of separation of about 8 μ m , formed by a biprism of apex angle 2°, were studied for their contrast, evolution of contrast, and positional and intensity stability over a period of 5   min (over 10 6 pulses). Second harmonic UV ( 255   nm ) sources of different spatial coherence and pointing stability characteristics were employed as the inputs. It is established that the UV fringes contrast and interference pattern stability with time is largely controlled by the optical resonator geometry of the fundamental wavelength ( 510   nm ) copper vapor laser (CVL) oscillator. In particular, the generalized diffraction filtered resonator (GDFR) CVL produced the highest quality second harmonic beam with the highest fringes contrast and stability. The implications of these results were studied by employing these UV sources for the fabrication of the C-band FBGs by a 24° apex angle biprism.

© 2007 Optical Society of America

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(140.3410) Lasers and laser optics : Laser resonators
(140.3610) Lasers and laser optics : Lasers, ultraviolet
(190.2620) Nonlinear optics : Harmonic generation and mixing

ToC Category:
Lasers and Laser Optics

Original Manuscript: April 17, 2007
Manuscript Accepted: June 4, 2007
Published: August 20, 2007

Om Prakash, Ramakanta Mahakud, Ramakanta Biswal, Shrikanth Gurram, Harilal S. Vora, and Sudhir K. Dixit, "Study on the quality of interference fringes from a pulsed UV source for application in a biprism based fiber Bragg grating writing," Appl. Opt. 46, 6210-6217 (2007)

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