Optical demultiplexing system
AssigneeNewport Corporation
InventorJamie Knapp
Life of this patent
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Abstract
Demultiplexing systems and methods are discussed which may be small and accurate without moving parts. In some cases, demultiplexing embodiments may include optical filter cavities that include filter baffles and support baffles which may be configured to minimize stray light signal detection and crosstalk. Some of the demultiplexing assembly embodiments may also be configured to efficiently detect U.V. light signals and at least partially compensate for variations in detector responsivity as a function of light signal wavelength.
Claims29
An optical demultiplexing device, comprising:
- at least one continuous linear array of photo detector elements;
- and
- a demultiplexing assembly which is optically coupled to the array, the demultiplexing assembly comprising multiple optical channels, each optical channel formed from at least one bandpass reflector and at least one optical filter, each bandpass reflector being disposed substantially along an input signal axis of the demultiplexing assembly and each channel configured to transmit an optical signal within a selected wavelength range to an active portion of the array of photo detector elements which is electrically isolated from adjacent active portions of photo detector elements of adjacent channels by one or more grounded photo detector elements.
An optical demultiplexing device, comprising:
- at least one continuous linear array of photo detector elements;
- and
- a demultiplexing assembly which is optically coupled to the array of photo detector elements, the demultiplexing assembly comprising:
- a plurality of optical channels, each optical channel formed from at least one bandpass reflector and at least one bandpass filter which is disposed in an optical filter cavity of a single piece baffle assembly, the optical filter cavity being at least partially bounded by a support baffle disposed over an output surface of the filter and including an output aperture and a filter baffle disposed between the filter cavity and adjacent optical channels.
A method of demultiplexing and analyzing a light signal, comprising:
- propagating a light signal to a first bandpass reflector of a demultiplexing assembly;
- reflecting a first spectral band of the light signal from the first bandpass reflector and propagating the first spectral band through a first band pass filter of the demultiplexing assembly;
- transmitting the remaining spectra of light not reflected by the first bandpass reflector from the first bandpass reflector to a second bandpass reflector;
- reflecting a second spectral band of the light signal from the second bandpass reflector and propagating the second spectral band through a second band pass filter of the demultiplexing assembly;
- detecting an amplitude of the first spectral band with a first active portion of a continuous linear array of photo detectors which is separated from a second active portion of the linear array by one or more grounded photo detector elements of an inactive portion of the linear array after the first spectral band has passed through the first band pass filter;
- and
- detecting an amplitude of the second spectral band with (a) the second active portion of the continuous linear array of photo detectors after the second spectral band has passed through the second band pass filter.
An optical demultiplexing device, comprising:
- at least one continuous linear array of photo detector elements;
- and
- a demultiplexing assembly which is optically coupled to the array, the demultiplexing assembly comprising multiple optical channels, each channel configured to transmit an optical signal within a selected wavelength range to an active portion of the array of photo detector elements which is electrically isolated from adjacent active portions of photo detector elements of adjacent channels by one or more grounded photodetector elements.
Dependencies are inferred from the claim text.