Patent ID: 8233805

Claim:
A closed path digital optical cable comprising: an optical fiber having a first end and a second end; a first interface configured to couple the closed path digital optical cable to a digital source device, the first interface comprising: an optical transmitter configured to receive a first electronic signal from the digital source device and to convert the first electronic signal to one or more optical signals, and transmit the one or more optical signals onto the first end of the optical fiber; and a laser driver circuit configured to provide a drive current to the optical transmitter without the use of temperature compensation, the laser driver circuit having a single temperature coefficient under all operating temperatures; a second interface configured to couple the digital optical cable to a digital sink device, the second interface comprising: an optical receiver configured to receive the one or more optical signals from the second end of the optical fiber, convert the one or more optical signals to a second electronic signal, and transmit the second electronic signal to the digital sink device, wherein the first interface and the second interface are interconnected with the optical fiber so as to form a closed optical path.