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We present an optical fiber voltage sensor by Michelson interferometer (MI) employing a Fabry–Perot (F–P) tunable optical filter and the phase generated carrier demodulation algorithm. By mounting an MI fabricated by an optical fiber coupler on a piezoelectric transducer, a dynamic strain would be generated to change the phase difference of the interferometer when the measured voltage is applied on...
Homodyne detection provides the simplest digital signal processing (DSP) solution to optical coherent detection and minimizes the receiver bandwidth requirements. These features make it promising for high spectrally efficient formats such as optical orthogonal frequency domain multiplexing (OFDM), which has a flat optical spectrum and which is thus inherently sensitive to high-frequency distortions,...
Toward an all-fiber system, an erbium fiber laser-based comb is directly stabilized to a 12C2H2 transition at 1539.4 nm. The comb fractional instability at 1532.8 nm is 6×10−12 at 100 ms gate time.
The generation of optical millimeter-wave with frequency 8-tupling is experimentally demonstrated. 625-Mb/sec QPSK data transmission at 105-GHz (W-band) is achieved for the first time using the millimeter-wave generation technique and direct modulation of a NBUTC-PD.
By integrating near-ballistic uni-traveling-carrier photodiodes with planar W-band bandpass filters, the demonstrated devices under optical local-oscillator and intermediate-frequency signals injection can exhibit high internal up-conversion-gain (14.2 dB) with a high output photocurrent (19 mA) at W-band (100 GHz).
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