Broadband Zinc Oxide Transducers for Integrated Optics.
Abstract
This program involved the design and subsequent development of acoustooptic transducers on silicon substrates for use in integrated optical systems for rf spectrum analysis. The transducers were to cover a minimum bandwidth of 250 MHz centered about 400 MHz and were to be capable of achieving transduction losses of 14dB or less at the frequency of minimum loss. Two such transducers were to be designed and fabricated, one for use with 7059 Corning glass waveguides with a refractive index of 1.58 and the other for use with Nb2O5 waveguides of refractive index 2.10. In addition, the program called for the design and fabrication of broadband matching networks to match the transducers to a 50-ohm transmission line and permit the adjustment of phase between transducers in order to provide a response which is flat to 2 dB over the entire band. Measured transduction losses of less than the 14 dB goal have been obtained, however, the propagation losses measured in both the piezoelectric ZnO and in the waveguide layer rule against the use of such transducers at higher frequencies. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1978
- Accession Number
- ADA062851
Entities
People
- D. Mergerian