Abstract
The new concept of the creation of an acousto-optic tunable filter (AOTF) with super-resolution and small size is discussed. The advantage of the device is based on the use of a novel type of multi reflector beam expander that produces a highly collimated optical beam (angular spread about 100 ppm), tilted with a change in optical wavelength. The proposed AOTF, 1 cm in length, can have an optical linewidth about 0.1 nm and up to 400 tunable channels at a wavelength of 1540 nm. It can be utilized as a tunable filter for dense wavelength-division multiplexing (DWDM) in fiber optic networks and as a small-sized tunable optical spectrometer, for example, in sensors of gases, liquids and solids. The acousto-optic tunable filter can be developed by known technology developed for the creation of integrated optics and microelectronics devices.
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Received: 28 April 2001 / Revised version: 22 August 2001 / Published online: 2 November 2001
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Tsarev, A. A new type of small size acousto-optic tunable filter with super narrow optical linewidth. Appl Phys B 73, 495–498 (2001). https://doi.org/10.1007/s003400100703
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DOI: https://doi.org/10.1007/s003400100703