US 2025/0146881 A1Published application

High speed optical frequency measurement device

AssigneeLumentum Technology UK Limited

InventorsLuis AMARAL, Colin SMITH, Giacinto BUSICO

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Abstract

An optical frequency measurement system includes a beam splitter configured to split a light beam into a plurality of measurement beams, including a first measurement beam and a second measurement beam; a first optical frequency measurement subsystem configured to receive the first measurement beam and measure a first frequency of the first measurement beam with a first accuracy range to obtain a first measured frequency that corresponds to a frequency of the light beam; and a second optical frequency measurement subsystem configured to receive the second measurement beam and measure a second frequency of the second measurement beam with a second accuracy range that is narrower than the first accuracy range to obtain a second measured frequency that corresponds to the frequency of the light beam with a higher accuracy than the first measured frequency.

Claims24

Dependent claims

An optical frequency measurement system, comprising:

a beam splitter configured to split a light beam into a plurality of measurement beams, including a first measurement beam and a second measurement beam;
a first optical frequency measurement subsystem configured to receive the first measurement beam and measure a first frequency of the first measurement beam with a first accuracy range to obtain a first measured frequency that corresponds to a frequency of the light beam;
and
a second optical frequency measurement subsystem configured to receive the second measurement beam and measure a second frequency of the second measurement beam with a second accuracy range that is narrower than the first accuracy range to obtain a second measured frequency that corresponds to the frequency of the light beam with a higher accuracy than the first measured frequency,
wherein the first optical frequency measurement subsystem comprises a first optical system having a first frequency response that is unique across a first frequency-span region such that each different frequency value within the first frequency-span region corresponds to a unique measurement value of the first measured frequency, the first frequency being within the first frequency-span region,
wherein the second optical frequency measurement subsystem comprises a second optical system having a second frequency response that is unique across a second frequency-span region such that each different frequency value within the second frequency-span region corresponds to a unique measurement value of the second measured frequency, the second frequency being within the second frequency-span region,
wherein the second frequency-span region is narrower than the first frequency-span region,
wherein the second frequency-span region is centered on the first measured frequency, and
wherein the first accuracy range is narrower than half of a frequency range of the second frequency-span region.

6 more elements

A method, comprising:

splitting, by a beam splitter, a light beam into a plurality of measurement beams, including a first measurement beam and a second measurement beam;
measuring, by a first optical frequency measurement subsystem, a first frequency of the first measurement beam with a first accuracy range to obtain a first measured frequency that corresponds to a frequency of the light beam;
and
measuring, by a second optical frequency measurement subsystem, a second frequency of the second measurement beam with a second accuracy range to obtain a second measured frequency that corresponds to the frequency of the light beam with a higher accuracy than the first measured frequency,
wherein the first optical frequency measurement subsystem comprises a first optical system having a first frequency response that is unique across a first frequency-span region such that the first measured frequency is unique to the first frequency provided at an input of the first optical system a first frequency response that is unique across a first frequency-span region such that each different frequency value within the first frequency-span region corresponds to a unique measurement value of the first measured frequency, the first frequency being within the first frequency-span region,
wherein the second optical frequency measurement subsystem comprises a second optical system having a second frequency response that is unique across a second frequency-span region such that the second measured frequency is unique to the second frequency provided at an input of the second optical system a second frequency response that is unique across a second frequency-span region such that each different frequency value within the second frequency-span region corresponds to a unique measurement value of the second measured frequency, the second frequency being within the second frequency-span region,
wherein the second frequency-span region is narrower than the first frequency-span region,
wherein the second frequency-span region is centered on the first measured frequency, and
wherein the first accuracy range is narrower than half of a frequency range of the second frequency-span region.

6 more elements

Dependencies are inferred from the claim text.