Laser diode package

A package for a laser diode, comprising:

• a closed capsule defined by a floor, a plurality of walls and a windowed cover, the windowed cover adapted to emit optical energy from the package;
• a laser diode adapted to convert electrical energy into optical energy, the laser diode mounted transversely to the floor of said capsule;
• detector means positioned between the floor and the laser diode, for monitoring the optical energy emitted from the laser diode;
• and
• cooling means in the capsule, including a liquid fluorocarbon, for cooling the laser diode, the cooling means having:
• a boiling point above a 42.degree. C. operating temperature of the cooling means which prevents boiling of the cooling means during use of the package, prevents formation of vapor bubbles in the package, prevents distortion of the optical energy emitted from the package, and further prevents formation of an insulating vapor layer on the laser diode;
• an index of refraction related to an index of refraction of the laser diode which maximizes the optical energy emitted from the package while reflecting sufficient optical energy to sustain feedback requirements of the laser diode;
• and
• an absorption spectra of less than 5% to infrared frequencies emitted by the laser diode.