The invention provides a laser array capable of outputting coherent laser. The laser array comprises a seed laser, an optical waveguide structure, an optical antenna array, a collimating lens array and a VCSEL (vertical cavity surface emitting laser) array, wherein the optical waveguide structure comprise a first waveguide and a second waveguide group, the first waveguide is used for transmittingseed light and coupling the seed light to each second waveguide in the second waveguide group; each optical antenna comprises a coupling unit, a phase modulation unit and a transmitting unit, and thetransmitting unit is used for transmitting the modulated seed light in the optical axis direction of the corresponding collimating lens; the collimating lens array is used for collimating the receivedseed light to the VCSEL array; the VCSEL array is used for optically amplifying the received collimated seed light to form laser. Uniform beam splitting and injection of the high-power seed light into the two-dimensional VCSEL array is achieved with the transmission technology based on the optical waveguide structure, and high-power and high-coherence multi-beam laser can be obtained.

Laser array capable of outputting coherent laser

A large-scale integrated optical switch chip based on an optical phased array is characterized by comprising a silicon-based phased array emission chip and a silicon-based phased array reception chipwhich are arranged opposite to each other and in parallel, the silicon-based phased array emission chip includes a 2D array composed of N*N optical phased array units, and each optical phased array unit is composed of a light beam splitter in a front input port, a phase modulator in the middle and a light emitting port in the tail end. The large-scale integrated optical switch chip is characterized by being completely free of obstruction, high in speed, low in insertion loss and low in crosstalk, and can satisfy requirement for large capacity data exchange of optical communication and opticalinterconnection network.

Large-scale integrated optical switch chip based on optical phased array

The invention discloses a coherent light source component. The component comprises a beam splitter, a slave laser array and a beam combiner; the beam splitter divides an input light source into n paths of laser outputs; the slave laser array enables the output laser and the input laser of the n paths of lasers to have the same frequency and fixed phase deviation through injection locking control;n paths of lasers are finally combined into a beam of laser output after being input into the beam combiner; a phase modulator is further arranged in front of an input end of the slave laser array orbehind an output end of the slave laser array; the phase modulator modulates the n paths of lasers input thereto into n paths of laser outputs having the same phase; the slave laser array is directlyconnected with the phase modulator or connected through a waveguide; an output end of the beam splitter is connected with an adjacent device through the waveguide; and the input end of the beam combiner is connected with an adjacent device through the waveguide. Based on the component of the invention, by improving the structure of the component, the output laser can have both stable power and lowRIN (Relativeintensity noise) characteristics to meet the application requirements.

Coherent light source component

The invention discloses an optical waveguide phased array laser radar. The optical waveguide phased array laser radar includes a transmitting end and a receiving end; in the transmitting end, the output end of a laser is connected with the input end of an optical beam splitter; after the output end of the optical beam splitter is connected with an optical waveguide array and an optical emitter array, output is realized; and the optical waveguide array is provided with an electronic control system. The laser emits laser; the optical beam splitter splits the laser into a plurality of optical beams which enter the optical waveguide array; the integrated electronic control system is utilized to act on the optical waveguide array so as to perform phase modulation; and finally the angular scanning of the output light emitted by the optical emitter array is realized. According to the optical waveguide phased array laser radar of the invention, a thermo-optic effect or an electro-optic effectis adopted, so that phase difference between multi-mode waveguides can be changed, and therefore, regulation of the angle of emergent light can be realized; a condition that an independent electroniccontrol unit is applied onto a single waveguide can be avoided. The optical waveguide phased array laser radar has the advantages of convenience in design, convenience in expansion, structural compactness and the like.

Optical waveguide phased array laser radar

The invention relates to a phased array laser radar. The radar comprises a laser generator, a light transmission medium, a light distribution device and Z radiation units, wherein the laser generatoris used for generating an original laser; the light distribution device is connected to the laser generator through the light transmission medium; the light distribution device includes a device usedfor receiving the original laser; each radiation unit is connected to the light distribution device; the Z is a natural number which is greater than 1; the light distribution device is used to distribute the original laser into Z paths of first light signals, and send each path of the first light signals to each radiation unit so that electromagnetic waves radiated by all the radiation units are combined into one radar wave; And the materials of the laser generator, the device and the light transmission medium are the materials capable of transmitting a laser whose power is greater than a setpower value. By using the phased array laser radar, the input power of the phased array laser radar can be increased and then the total power of a radar wave synthesized by all the radiation units isincreased too.

Phased array laser radar

The invention discloses an active optical phased array photon integration chip and a manufacturing method thereof. The chip comprises a coherent laser array, an optical phase modulator array, a transitional waveguide array and a light field radiation array, wherein the coherent laser array is a master-slave laser realized through a same material and a same technology; through a unidirectional injection locking mode, a plurality of slave lasers possess a same frequency and good coherence of a fixed phase; the optical phase modulator array controls phase delay of each optical phase modulator in the plurality of optical phase modulators to light through an electric signal modulation mode; and the transitional waveguide array and the light field radiation array are used for adjusting wave beams and emission positions of coherent beams which are emitted from different lasers, pass through different optical phase modulators and possess different optical phase delays and determining a coherent superposed light beam emitting direction according to differences of the phase delays. The integration chip can be integrated on a same substrate. Total power of output light is formed by coherent superposition of slave lasers. And the chip possesses advantages of chip integration and high emitting power.

Hao Zhibiao

Papers

Active optical phased array photon integration chip and manufacturing method thereof