Auto-aligning spectroscopy system

A method of auto-aligning a spectroscopy system, the method comprising:

• directing at least a first laser beam and a second laser beam from a launcher unit through a first window of a chamber, wherein the first laser beam is co-linear with the second laser beam;
• receiving the co-linear first laser beam and the second laser beam at a second window of the chamber;
• separating the second laser beam from the first laser beam such that the first laser beam is incident on a first detector and the second laser beam is incident on a second detector;
• generating at least two signals indicative of a first position of the second laser beam incident on the second detector, wherein the first position is different from a determined position;
• generating at least one signal indicative of a power associated with the second laser beam;
• determining a deviation of the second laser beam incident on the second detector from the determined position;
• determining a power loss of the second laser beam based on a power associated with the second laser beam;
• aligning the launcher unit to a base-line position when the determined power loss of the second laser beam is greater than a determined threshold value;
• identifying a scattering of the second laser beam when the determined power loss is less than the determined threshold value;
• determining an absorption power loss of the first laser beam based on the determined power loss of the second laser beam when the scattering of the second laser beam is identified;
• and
• measuring a gas species in the chamber based on the determined absorption power loss of the first laser beam.

An auto-aligning spectroscopy system, comprising:

• a launcher unit disposed adjacent to a first window of a chamber and configured to direct a first laser beam and a second laser beam through the chamber, wherein the launcher unit comprises:
• a first laser source configured to emit the first laser beam;
• a second laser source configured to emit the second laser beam;
• a first dichroic mirror disposed at a first determined angle and configured to:
• transmit the first laser beam through the first dichroic mirror;
• reflect the second laser beam along a direction of the first laser beam such that the second laser beam is co-linear with the first laser beam;
• a first lens disposed downstream of the first dichroic mirror to collimate the first laser beam with the second laser beam;
• a receiver unit disposed adjacent to a second window of the chamber and configured to receive the first laser beam and the second laser beam passing through the chamber, wherein the receiver unit comprises:
• a second lens disposed adjacent to the second window of the chamber and configured to converge the first laser beam and the second laser beam;
• a second dichroic mirror disposed adjacent to the second lens and configured to separate the first laser beam from the second laser beam;
• a first detector disposed downstream of the second dichroic mirror and configured to determine an intensity associated with the first laser beam incident on the first detector;
• a second detector disposed downstream of the second dichroic mirror and configured to:
• determine a deviation of the second laser beam from a determined position based on the second laser beam incident on the second detector;
• a motorized stage configured to align the spectroscopy system to a base-line position when a power loss of the second laser beam is greater than a determined threshold value;
• and
• a controller unit configured to identify a scattering of the second laser beam when the power loss of the second laser beam is less than the determined threshold value and there is no deviation of the second laser beam from the determined position.

An auto-aligning spectroscopy system, comprising:

• a launcher unit configured to direct a first laser beam and a second laser beam through a chamber, wherein the first laser beam is co-linear with the second laser beam;
• a receiver unit configured to receive the first laser beam and the second laser beam passing through the chamber, wherein the receiver unit comprises:
• a first detector configured to determine an intensity of the first laser beam;
• a second detector configured to:
• determine a deviation of the second laser beam from a determined position;
• determine a power loss of the second laser beam based on a power associated with the second laser beam;
• a motorized stage configured to align the launcher unit to a base-line position based on the determined deviation of the second laser beam;
• and
• a controller unit configured to identify a scattering of the second laser beam when the determined power loss is less than a determined threshold value and there is no deviation of the second laser beam from the determined position.