Optical leak detection in liquid cooling systems using holographic optical element

A method comprising:

• placing a holographic optical element (HOE) on a bottom surface of an inverted server, the HOE having an interference pattern that functions as mirrors in the inverted server when illuminated by a light source;
• and
• directing an optical sensor at the HOE to detect a fluorescent light emitted from a liquid drop at a first wavelength when illuminated by the light source, the liquid drop landing on the HOE from a cooling liquid,
• wherein the interference pattern is created by a laser beam operating to form a hologram at a second wavelength substantially close to the first wavelength.

An information handling system, comprising:

• a hose that transports cooling liquid mixed with a fluorescent dye in an inverted server;
• and
• a leak detector comprising:
• a holographic optical element (HOE) configured to have an interference pattern that functions as mirrors in the inverted server when illuminated by a light source, the HOE being placed on a bottom surface of the inverted server;
• and
• an optical sensor directed at the HOE and configured to detect a fluorescent light emitted from a liquid drop at a first wavelength when illuminated by the light source, the liquid drop landing on the HOE from the cooling liquid,
• wherein the interference pattern is created by a laser beam operating to form a hologram at a second wavelength substantially close to the first wavelength.