Abstract: A broadband radio frequency signal optical fiber phase-stable transmission system includes a local end and a remote end connected by a dispersion compensation module and an optical fiber. The local end modulates a first auxiliary signal whose frequency is half of the frequency of the to-be-transmitted signal and a second auxiliary signal whose frequency is 1.5 times the frequency of the to-be-transmitted signal through the optical carrier and filters out a lower sideband to obtain an optical signal containing only the optical carrier, a first signal, and a second signal corresponds to the optical signal of the first-order upper sideband. The optical signal is transmitted to the remote end through the dispersion compensation module and the optical fiber.

Abstract: The invention discloses a fast measurement apparatus for optical link delay based on optical mixing and delay quantization. The apparatus uses a high-stability reference source to generate intermediate frequency signal and local oscillator signal, and obtains optical domain radio frequency signals through photon mixing, so as to use for the measurement of optical link delay. After the test signal passes through the link to be tested and the reference link, and then is mixed in the electrical domain, the delay amount information is transmitted to the intermediate frequency, and the influence of port impedance mismatch is eliminated. By rapidly changing the frequency of a series of signals, and quickly detecting the phase and quantifying the delay of the returned intermediate frequency signal, the fast measurement of the optical link delay is realized.

Abstract: This disclosure relates to the field of plant molecular biology; more particularly to the field of agriculture; even more particularly to the field of improving the yield of plants. This disclosure provides chimeric genes and constructs that can be used to enhance the yield in plants and crops.

Abstract: This disclosure relates to the field of plant molecular biology; more particularly to the field of agriculture; even more particularly to the field of improving the yield of plants. This disclosure provides chimeric genes and constructs that can be used to enhance the yield in plants and crops.