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This work reviews a high-speed, direct modulation underwater optical communication link enabled by a combination of polarization and Orbital Angular Momentum (OAM) multiplexing techniques that results in a data rate of 12 Gbit/s. An efficient technique for combining and sorting multiple OAM modes is presented based on log-polar coordinate transformation diffractive phase only optics.
This work presents the generation, dynamic phase modulation and phase detection of interfering composite optical vortices. This technique demonstrates a new method for encoding information onto an optical beam for potential use in underwater communication as well as sensing applications including object detection and channel characterization.
With the increase of accelerator luminosity, the rate requirement for timing MRPC becomes important. Usually MRPCs are assembled with ordinary glass plates of 1.0 mm or thicker, but their rate capability is only about 200 Hz/cm2, which cannot afford to the future high rate requirement. DC model and a two dimensional resistor network model suggested that the rate capability of MRPC is largely dependent...
By the product of magnetostriction and stress-birefringence, the laminate composites that can show Voigt effect was suggested and fabricated. Under a magnetic field no stronger than 1900 Oe, a phase difference of about 3.3π was observed for a trilayer composite Tb1-xDyxFe2-y / polycarbonate / Tb1-xDyxFe2-y with the polycarbonate layer in size of 5×2.75×20 mm3 at room temperature, resulting in a half-wave...
The gain lever effect in quantum dot lasers is studied for the first time. A maximum enhancement of 8-dB in the modulation efficiency is observed by using a two-section configuration
Novel multi-section quantum dot mode-locked lasers are reported. The multi-section configurations significantly increase the peak pulsed power (≫45%) and improve the pulse width (≫35%) of the devices
Directly-modulated quantum dot lasers showed that the highest relaxation frequency decreases monotonically with the p-doping level from 5.3 GHz (undoped wafer), to 4.6 GHz (20 holes/dot), 3.8 GHz (30 holes/dot) and 3.6 GHz (40 holes/dot).
A dielectric microcavity of dye doped polydimethylsiloxane (PDMS) is fabricated by SU-8 photoresist molding technique. The molding technique by fabricating a solid polymer dye microcavity laser is described in detail. The dye laser microcavity resonators properties are confirmed
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