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Optical Engineering

Fabrication of λ/2 phase step mirror for CO2 laser resonator using diamond turning
Author(s): Vinod Mishra; Abhik K. Biswas; Neeraj Kumar; Lalit M. Kukreja; Ramagopal V. Sarepaka
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Paper Abstract

A stable optical resonator comprising a spherical rear mirror with a phase step of λ/2 at its center and a flat output coupler promises to produce a beam with very low diffraction. Based on this premise, a phase step mirror is fabricated on oxygen-free high-conductivity copper substrate using single-point diamond turning method for use in kilowatt-class CO 2 laser. The fabrication technique and subsequent metrology measurements of the optical component, e.g., surface profile error and surface finish, are discussed.

Paper Details

Date Published: 21 March 2014
PDF: 7 pages
Opt. Eng. 53(3) 036107 doi: 10.1117/1.OE.53.3.036107
Published in: Optical Engineering Volume 53, Issue 3
Show Author Affiliations
Vinod Mishra, Central Scientific Instruments Organisation (India)
Abhik K. Biswas, Raja Ramanna Ctr. for Advanced Technology (India)
Neeraj Kumar, Central Scientific Instruments Organisation (India)
Lalit M. Kukreja, Raja Ramanna Ctr. for Advanced Technology (India)
Ramagopal V. Sarepaka, Central Scientific Instruments Organisation (India)

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