Patent ID: 6765682
Filing Date: 2004-07-20
Classification: G01J,H01S,H04B

Abstract:
An apparatus for determining at least a first characteristic and a second characteristic of an optical signal, comprising:a first etalon, for receiving a first portion of said optical signal, coupled to a first optical detector, for generating a first electrical signal representative of said optical signal, the first etalon having a first predetermined wavelength dependent transmission function; a second etalon, for receiving a second portion of said optical signal, coupled to a second optical detector for generating a second electrical signal representative of said optical signal, the second etalon having a second predetermined wavelength dependent transmission function that is different than the first predetermined wavelength dependent transmission function; a circuit for receiving said first and said second electrical signals and for generating at least a first output signal dependent on said first and said second characteristics and for generating at least a second output signal dependent on said first characteristic of said optical signal; and a processor for receiving said first and said second output signals and for determining said first characteristic from said second output signal and determining said second characteristic from said determined first characteristic and said first output signal.