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By combing Si/Ge avalanche photodiodes based electrical comb-line generators with photonic-transmitter-mixers, millimeter-wave short-pulse generations for photonic ultra-wideband linking at W-band with wireless transmission distance up to 12 meter and error-free 1.5Gbps data rate are demonstrated.
We demonstrate a 10-Gb/s optical-carrier-distributed network with wireless communication system. The 10-Gb/s W-band wireless-signal was generated by a near-ballistic-uni-traveling-carrier-photodiode (NBUTD-PD) based transmitter optically excited by 0.1-THz optical pulses. 20-km optical fiber upstream transmission is achieved.
To explore the optical neural stimulation with visible light, 620-nm red light pulse emitted by LED was used to stimulate the left primary visual cortex of adult rat. The neural response in right primary visual cortex was recorded with a flexible microelectrode. By synchronized averaging the raw signal, optical evoked potentials (OEPs) were observed a negative wave and positive wave after optical...
We demonstrate a remotely up-converted and distributed 20-Gbit/s wireless on-off-keying (OOK) data transmission link at the W-band that uses a near-ballistic uni-traveling-carrier photodiode (NBUTC-PD)-based photonic transmitter-mixer. This device consists of an active NBUTC-PD integrated with a planar passive circuit for feeding the intermediate-frequency (IF) modulation input and extracting the...
Photonic transmitter-mixers with ultra-wide O-E/modulation bandwidths excited by remote-distributed pulse trains for 20Gbps error-free wireless transmission is presented. The S/N ratios and output power are greater than sinusoidal excitation.
By using optimized shaped optical pulses, we demonstrate a factor-of-∼25 enhancement in the spectral power density of sub-THz wave at 93 GHz compared with that for quasi-sinusoidal optical modulation.
We report generation of high-modulation-depth photonic millimeter-wave (MMW) waveforms by applying line-by-line pulse shaping on a phase-modulated continuous-wave frequency comb. The optimized 20 and 100 GHz optical waveforms are then converted into electrical MMW signals using a near-ballistic uni-traveling-carrier photodiode (NBUTC-PD). A 7.4 dB MMW power enhancement is experimentally achieved by...
We experimentally demonstrate an optical ultra-wideband (UWB) (75 GHz-110 GHz) fiber-to-the-antenna (FTTA) system using our developed W-band near-ballistic unitraveling-carrier photodiode (NBUTC-PD) based photonic transmitter (PT). 2.5 Gb/s and 1.5 Gb/s UWB-FTTA systems with 1,024 high split-ratio are demonstrated.
We demonstrate two high-performance photonic-transmitters based on uni-traveling-carrier-photodiode (UTC-PD) and separated-transport-recombination-photodiode (STR-PD). Thanks to recombination center, STR-PD exhibits comparable maximum-peak-power and electrical pulse-width with much smaller photocurrents and less serious device-heating to those of UTC-PD.
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