US 2019/0101630 A1 · LASER PHASE ESTIMATION AND CORRECTION

Abstract

In one general aspect, a non-transitory computer-readable storage medium can be configured to store instructions that when executed cause a processor to perform a process. The process can include producing a segment of a laser signal where the segment of the laser signal has a duration, and producing a first reference signal based on the laser signal. The process can include calculating a first phase deviation corresponding with a first portion of the duration based on the first reference signal, and producing a second reference signal based on the laser signal. The process can include calculating a second phase deviation corresponding with a second portion of the duration based on the second reference signal, and calculating a phase deviation of the segment of the laser signal based on a combination of the first phase deviation and the second phase deviation.

Claims12

Dependent claims

An apparatus, comprising:

a laser source configured to produce a laser signal;
a receiver configured to analyze, based on a sampling time period, a reflected signal from the laser signal;
a first reference module including a first delay and configured to produce a first reference signal based on the laser signal, the first delay being a first integer multiple of the sampling time period;
a second reference module including a second delay and configured to produce a second reference signal based on the laser signal, the second delay being a second integer multiple of the sampling time period, the second integer multiple being relatively prime to the first integer multiple;
and
a phase detector configured to detect a phase deviation associated with a duration produced by a delay of a synthesized reference signal, the duration produced by the delay being a combination of the first delay and the second delay.

3 more elements

A non-transitory computer-readable storage medium storing instructions that when executed cause a processor to perform a process, the process comprising:

producing a segment of a laser signal, the segment of the laser signal having a duration;
analyzing a reflected signal from the laser signal based on a sampling time period;
producing a first reference signal based on the laser signal;
calculating a first set of phase deviations corresponding with a first set of portions of the duration based on the first reference signal, each of the first set of phase deviations being respective integer multiples of a first set of integer multiples of the sampling time period, the first set of integer multiples forming a first arithmetic sequence;
producing a second reference signal based on the laser signal;
calculating a second set of phase deviations corresponding with a second set of portions of the duration based on the second reference signal, each of the second set of phase deviations being respective integer multiples of a second set of integer multiples of the sampling time period, the second set of integer multiples forming a second arithmetic sequence;
and
calculating a phase deviation of the segment of the laser signal based on a combination of the first set of phase deviations and the second set of phase deviations.

5 more elements

Dependencies are inferred from the claim text.

Laser phase estimation and correction

Life of this patent

Laser phase estimation and correction

Life of this patent

Abstract

Claims12