An integrated optical preprocessor for multichannel analog data
Abstract
As a precursor to the construction of a 16-channel device, a 3-channel integrated optical data preprocessor has been fabricated and tested. The device, which is fabricated in an outdiffused LiNbO3 waveguide, provides a signal related to the channel-by-channel difference between a prerecorded reference set and an incoming data set which is presented in the form of parallel analog voltages. The data are impressed upon the guided wave as a set of electrooptically induced phase shifts, and the comparison to the reference set is performed by holographic subtraction. The reference set can either be introduced as a separate operation or it can be 'learned' by the preprocessor during operation.
- Publication:
-
"Smart" Sensors
- Pub Date:
- November 1978
- Bibcode:
- 1978smse.confR....V
- Keywords:
-
- Analog Data;
- Data Processing Equipment;
- Integrated Optics;
- Optical Data Processing;
- Beam Splitters;
- Electrodes;
- Lithium Niobates;
- Mirrors;
- Optical Waveguides;
- Volt-Ampere Characteristics;
- Instrumentation and Photography