Patent ID: 6942812
Filing Date: 2005-09-13
Classification: G02B,H01S

Abstract:
1. A method of producing an etalon having a desired thickness, comprising the steps of: measuring a thickness of an etalon base plate, placing the etalon base plate in a process chamber, introducing a gas having a chemical reactivity with respect to the etalon base plate into the process chamber, and etching a surface of the etalon base plate by producing an ion beam of the gas for a specific time corresponding to a thickness of the etalon base plate so that the desired thickness is obtained, wherein the specific time is based on a relationship between a first selected one of a plurality of peak wavelengths of a first spectrum transmitted through the etalon base plate from a multiple longitudinal mode laser and a second selected one of a plurality of peak wavelengths of a second spectrum of the multiple longitudinal mode laser without transmission through the etalon base plate.