Patent ID: 6285476
Filing Date: 2001-09-04
Classification: H04B

Abstract:
A dichroic wavelength-multiplexed laser communication system for full duplex wideband data transmission in excess of 1.5 Mbps between buildings at distance of 1-20 km and with unobstructed line of sight, comprising:first terminal means having a first laser source for transmitting laser light at a first wavelength; a first laser receiver means for receiving laser light at a second wavelength; and a first optical system through which both said laser light at said first wavelength and said laser light at said second wavelength travel, said first optical system including first optical means for multiplexing said transmitted laser light at said to first wavelength and said received laser light at said second wavelength; andsecond terminal means having a second laser source for transmitting said laser light at said second wavelength; a second laser receiver means and receiving said laser light at said first wavelength; and a second optical system through which both said laser light at said first wavelength and said laser light at said second wavelength travel, said second optical system including second optical means for multiplexing said transmitted laser light at said second wavelength and said received laser light at said first wavelength, whereineach of said first and second laser sources includes laser diode means for generating laser light and formed so as to generate at a power level so as to transmit laser light in excess of 1 km and 1.5 Mbps, and thermoelectric cooler means for actively cooling said laser diode means.