A laser diode cooled by a solid-state heat pump, all in a TO-8 can.
The HV14 thermoelectric cooler is made by North Carolina's Nextreme and at 85°C it can pump 1.7W of heat in a footprint of less than 3mm2.
A temperature differential up to 50°C can be created and as part of a demonstration a laser diode was cooled from 42°C to approximately 21°C "in milliseconds", claimed the firm, and the output level of the laser nearly doubled from 0.38mW to 0.74mW at a drive current of 100mA.
"An optical spectrum analyser measured a wavelength shift toward the blue spectrum of approximately 13.6nm," said Nextreme.
A test report and a video are available.