Patent ID: 7020174

Claim:
A laser diode module for optical communication, comprising: a housing having a vertical wall; a heat sink disposed on the housing; a superlattice microcooler disposed on the heat sink; a laser diode disposed on one side of the superlattice microcooler; a photo diode to convert light received from the laser diode into current; and a light condensing unit, disposed on one side of the heat sink, to condense laser beams emitted from the laser diode, wherein said microcooler comprises an SiGe/Si superlattice layer composed of 10 nm SiGe/10 nm Si (100×), for a total thickness of 2 um, and formable through a molecular beam epitaxy (MBE) process, wherein superlattice layer is alternatively configurable as SiGeC/Si rather than SiGe/Si.