Acousto - Optic Isolator ( Aoi )
نویسندگان
چکیده
منابع مشابه
All-fiber-optic nonreciprocal modulator.
A new all-fiber-optic nonreciprocal device using two acousto-optic frequency shifters is proposed and demonstrated. When the device was operated as an optical isolator, an extinction ratio of 22 dB was obtained. The device's unique modulation capability is also described.
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We show that an all-fiber acousto-optic tunable filter based on polarization mode coupling using torsional acoustic wave is immune to the fiber bend and physical contact in the acousto-optic interaction region. We also propose and demonstrate a novel strain-free and size-reduced tunable filter with a 4-m-long fiber acousto-optic interaction region looped into a 5- cm-diameter coil.
متن کامل1 Ja n 20 09 Detection of the tagged or untagged photons in acousto - optic imaging of thick highly scattering media by photorefractive adaptive holography
Detection of the tagged or untagged photons in acousto-optic imaging of thick highly scattering media by photorefractive adaptive holography We propose an original adaptive wavefront holographic setup based on the photorefractive effect (PR), to make real-time measurements of acousto-optic signals in thick scattering media, with a high flux collection at high rates for breast tumor detection. W...
متن کاملDifferent Plastic Materials Based Acousto-optic Modulators (AOMs) Design Considerations for Fast Switching Applications
An acousto-optic modulator (AOM) allows to diffract a laser beam going through a crystal from the incidence angle (order 0) to another angle (order 1). The diffracted beam intensity depends on the radio frequency (RF) power applied to the device while the output angle depends on the material but is also proportional to the laser wavelength and to the RF drive frequency. When only intensity modu...
متن کاملSidelobe suppression in all-fiber acousto-optic tunable filter using torsional acoustic wave.
We propose two techniques to suppress intrinsic sidelobe spectra in all-fiber acousto-optic tunable filter using torsional acoustic wave. The techniques are based on either double-pass filter configuration or axial tailoring of mode coupling strength along an acousto-optic interaction region in a highly birefringent optical fiber. The sidelobe peak in the filter spectrum is experimentally suppr...
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