US 9,755,758 B2 · Spectral analysis using a spatial light modulator

Abstract

According to an example, an optical transmission device may include a spatial light modulator having a plurality of cells, in which different wavelengths of a light beam are to impinge upon different groups of pixels along a dispersion direction. The device may also include a driver mechanism to modulate, at a first frequency, a first group of the plurality of cells upon which light having a first wavelength impinges to impress a first frequency fluctuation onto a property of an output light including the first wavelength and to modulate, at a second frequency, a second group of the plurality of cells upon which light having a second wavelength impinges to impress a second frequency fluctuation onto a property of an output light including the second wavelength, in which the second frequency modulation differs from the first frequency modulation.

Claims20

Dependent claims

An optical transmission device comprising:

a spatial light modulator having a plurality of cells, wherein different wavelengths of a light beam are to impinge upon different groups of pixels along a dispersion direction;
and
a driver mechanism to modulate, at a first frequency, a first group of the plurality of cells upon which light having a first wavelength impinges to impress a first frequency fluctuation onto a property of an output light including the first wavelength and to modulate, at a second frequency, a second group of the plurality of cells upon which light having a second wavelength impinges to impress a second frequency fluctuation onto a property of an output light including the second wavelength, wherein the second frequency fluctuation differs from the first frequency fluctuation.

A method for performing spectral analysis using a spatial light modulator having a plurality of pixels, wherein different wavelengths of a light beam impinge upon different groups of pixels along a dispersion direction, said method comprising:

modulating, at a first frequency, a first group of the plurality of pixels upon which light having a first wavelength impinges to impress a first frequency fluctuation onto a property of an output light including the first wavelength;
and
modulating, at a second frequency, a second group of the plurality of pixels upon which light having a second wavelength impinges to impress a second frequency fluctuation onto a property of an output light including the second wavelength of light, wherein the second frequency fluctuation differs from the first frequency fluctuation.

An optical transmission device comprising:

an input;
a plurality of outputs;
a spatial light modulator having a plurality of pixels;
optics to disperse a light beam received through the input onto the spatial light modulator such that different wavelengths of the light beam impinge on different groups of pixels along a dispersion direction, wherein the spatial light modulator is to selectively direct output light to the plurality of outputs;
a driver mechanism to modulate, at a first frequency, a first group of the plurality of cells upon which light having a first wavelength impinges to impress a first frequency fluctuation onto a property of an output light including the first wavelength and to modulate, at a second frequency, a second group of the plurality of cells upon which light having a second wavelength impinges to impress a second frequency fluctuation onto a property of an output light including the second wavelength, wherein the second frequency fluctuation differs from the first frequency fluctuation;
and
at least one optical detector to detect the property of the output light.

4 more elements

Dependencies are inferred from the claim text.

Spectral analysis using a spatial light modulator

Life of this patent

Spectral analysis using a spatial light modulator

Life of this patent

Abstract

Claims20