منابع مشابه
Acoustooptic digital filter.
Digital filters have three components: (1) unit delays, (2) multipliers, and (3) adders. These components can be implemented by using (1) a Bragg cell as a tapped delay line, (2) optical multiplication using the Bragg cell transmittance, and (3) photodetectors. Multiplexing techniques are shown to increase geometrically the data handling capacity of such filters. An architecture for a 2-D digit...
متن کاملAdaptive acoustooptic filter.
The design of optimum systems, in the classical sense, requires a priori some knowledge of the signals to be encountered. As a result, such systems perform poorly when the appropriate characteristics of the input signals are not known a priori sufficiently well or are timevarying. An adaptive processor has the ability to selfoptimize by continually monitoring its performance and updating its pa...
متن کاملReduced Sidelobe Integrated Acoustooptic Filter using Birefringence Apodization
AOTF, acoustooptic filter, lithium niobate, integrated optics A two-section integrated acoustooptic tunable filter with significantly reduced sidelobes has been fabricated. The sidelobe reduction was achieved using birefringence apodization in the form of variable width Ti stripe waveguides. The design and fabrication of the device, which includes integrated proton exchanged TE and TM pass pola...
متن کاملNear-infrared detection of flow injection analysis by acoustooptic tunable filter-based spectrophotometry.
The instrumentation development of a near-infrared (near-IR) spectrophotometer based on an acoustooptic tunable filter (AOTF) and its application as a detector for flow injection analysis (FIA) are reported. In addition to being compact and all solid state, this AOTF-based instrument is very sensitive, has high resolution, and can be rapidly scanned. The latter advantage make it uniquely suited...
متن کاملWavelength-Swept Fiber Laser with Frequency Shifted Feedback and Resonantly Swept Intra-Cavity Acoustooptic Tunable Filter
This paper concerns a wavelength-swept fiber laser (WSFL) incorporating frequency shifted feedback and an intracavity passband filter, in which the wavelength of the modeless output is linearly, continuously and repeatedly tuned (in time) over a given range by modulation of the filter peak wavelength and filter strength. We show both numerically and experimentally that amplifier noise plays a k...
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ژورنال
عنوان ژورنال: Applied Optics
سال: 1985
ISSN: 0003-6935,1539-4522
DOI: 10.1364/ao.24.000829