Patent Number: 6,294,821

Title: Single-chip wavelength converter

Abstract: A high performance photodetector is integrated with a high performance modulator and a resistor on a single semiconductor substrate, all three sharing a common node. Voltage biases are applied to each of the diodes of the photodetector and modulator. As light is incident on the photodetector a current is generated which causes a voltage drop across the resistor. The voltage across the modulator then becomes the difference between its voltage bias and the voltage drop across the resistor. By properly selecting a resistor any desirable voltage swing is achieved without electrical amplifiers. Since the device is primarily optical and on a single semiconductor substrate, the device is independent of data rate, subject only to the inherent timing constant of the circuit.

Inventors: Chandrasekhar; Sethumadhavan (Matawan, NJ)

Assignee: Agere Systems Optoelectronics

International Classification: H01L 31/06 (20060101); H01L 31/075 (20060101); H01L 31/102 (20060101); H01L 31/05 (20060101); H01L 31/105 (20060101); H01L 031/05 (); H01L 031/075 (); H01L 031/105 ()

Expiration Date: 09/25/2018