Fiber optic coupled multipass gas minicell, design assembly thereof

An apparatus for gas spectroscopy of a gas of interest, comprising:

• a gas cell,
• a gas containment system for introducing the gas of interest into said gas cell,
• a light source that produces a light beam,
• a transmitting optical fiber or fibers connected to said cell that direct said light beam into said gas cell and onto the gas of interest,
• a receiving optical fiber or fibers connected to said gas cell that receives said light beam from the gas of interest in said gas cell;
• and
• an analyzer connected to said receiving optical fiber or fibers that produces gas spectroscopy data.

A method of analyzing a gas of interest, comprising the steps of:

• providing a gas cell,
• directing the gas of interest into said gas cell,
• using an emitting light source to produce a emission light beam,
• directing said emission light beam into said gas cell through an optical fiber and onto the gas of interest,
• reflecting said emission light beam within said gas cell to make multiple passes through the gas of interest,
• directing said emission light beam from said gas cell and from the gas of interest through an optical fiber to an analyzer, and
• using said analyzer to analyze said laser emission light to produce gas spectroscopy data.