47 results about "Optoelectronic oscillator" patented technology

A wholly optically controlled phased array transmitter with integrated tunable optoelectronic oscillators, which are based on multi-wavelength optical sources and optical true time delay units, and optical time delay networks, having a multi-wavelength optical source, a first wavelength division multiplexer, a first optical splitter, a first electro-optic modulator, a second optical splitter, a first optical amplifier, a first optical time delay network, a photodetector, an electric amplifier, a DC-block, a second electro-optic modulator, a second optical amplifier, a second optical time delay network, an optical combiner, a second wavelength division multiplexer, an optical fibers, a photodetector array, a T / R component array, a microwave antenna array, a 1×2 optical switch, a 2×2 optical switch, a circulator, a third wavelength division multiplexer, a bundle of optical fibers with precise lengths, and a Faraday rotation mirror.

A multi-mode optoelectronic oscillator (MM-OEO) includes an OEO cavity having an input for receiving an RF signal and an RF output. The OEO cavity includes a) a first laser having a first laser output, a second laser having a second laser output, b) a modulator having i) a first input coupled to the first laser output, ii) a second input coupled to the second laser output, iii) a third input, iv) a first modulator output, and v) a second modulator output, c) a semiconductor optical amplifier (SOA) having an input coupled to the first modulator output and having an SOA amplified output, d) a photodetector coupled to the SOA amplified output and having an output, and e) a coupler having an input coupled to the photodetector output and having a first output coupled to the third modulator input and a second output, whereby an amplified RF signal is produced at the OEO RF output.

The invention discloses a miniaturized photoelectric oscillator chip based on SIP packaging technology, comprising a photoelectric oscillator optical module, a photoelectric oscillator electrical module and a metal ceramic shell for packaging; the components of the optical module are sintered on a gold-plated surface by a gasket. On the bottom surface of the housing, the components of the electrical module are sintered on the bottom surface of the gold-plated housing by digging holes in the microstrip plate, and transmit signals through the microstrip plate; the optoelectronic oscillator chip presents modular isolation, and the optical module and the electrical module are isolated by a metal partition , and the light-absorbing material and the wave-absorbing material are respectively coated on the outside of the partition. Signals such as power supply and output of the optoelectronic oscillator chip are transmitted through the pins of the Ceramic Quad Flat Package (CQFP). The invention utilizes the SIP packaging technology to realize the chip-based three-dimensional integration of the low-phase noise photoelectric oscillator, realizes integrated, light and small, tunable, electromagnetic compatibility design, greatly reduces the volume and weight of the photoelectric oscillator system, and satisfies the future radar frequency synthesis system. Modularization, high reliability, miniaturization and other development needs.

The invention discloses a device for generating arbitrary frequency multiplication signals of optical frequency combs on basis of a coupled type optoelectronic oscillator. According to the device, a phase locked loop is utilized to lock the phase of the oscillation signals of the coupled optoelectronic oscillator to a highly-stable reference source, so that low-phase-noise and high-stability radiofrequency signals can be generated; the synchronous matching of lock frequencies and optical fiber laser modes is realized, and therefore, stable optical frequency comb output is realized; and sincethe optical frequency combs undergo the loops of optical fiber delay lines of different lengths, an optical coupler couples the optical frequency combs undergoing different time delay, and then optical frequency combs of any multiplied frequencies can be generated. The device of the present invention can be suitable for providing stable optical signal sources for systems such as planetary detection, fiber optic communication, and attosecond pulse systems.