4results about How to "Good tunability" patented technology

This invention discloses a device for real-time analysis of multidimensional information of spatiotemporally mode-locked pulses using an all-fiber structure, belonging to the field of ultrafast optics technology. It includes an all-fiber spatiotemporally mode-locked laser platform, a raw pulse beam profile measurement module, an optical circulator, a sub-pulse beam profile measurement module, and a dispersive Fourier transform and real-time spectral information detection module. Based on the generalized multimode nonlinear Schrödinger equation, this invention constructs a theoretical model of the spatiotemporally mode-locked laser, explores the multidimensional parameter coupling mechanism during spatiotemporal mode-locking, clarifies the mapping relationship between modes and frequencies, and provides a theoretical basis and method for high-precision mode differentiation and multidimensional real-time information extraction. This invention aims to rationally design the parameters of each fiber grating according to the spectral width and temporal interval of the spatiotemporally mode-locked pulse, reflecting more sub-pulses while ensuring that the pulse temporal domains do not overlap, achieving high-precision spatial mode resolution, and maximizing pulse broadening to obtain high-resolution real-time spectral information.

The invention discloses a tunable focusing device for a high-power semiconductor laser. The tunable focusing device comprises a semiconductor laser coupling head, a bottom plate and a lens base, the semiconductor laser coupling head is coupled with an output optical fiber of the semiconductor laser to ensure laser input, is provided with a water inlet and a water outlet and is connected with a cooling water pipe to ensure stable operation under a high-power condition, the bottom plate comprises a sliding groove, and the width of the lens base is matched with the width of the sliding groove of the bottom plate. And by introducing cooling water and adjusting the position of the lens base, the adjustable output of the imaging proportion of the high-power semiconductor laser can be realized, and the high-power semiconductor laser has good practicability.

The application discloses a kind of photonic-assisted microwave spectrum detection device and method based on single-bit compressed sensing, its device includes continuous wave laser, first and second optical coupler, phase modulator, Mach-Zehnder modulator, double parallel Mach-Zehnder modulator, electrical comb generator, optical isolator, single-mode optical fiber, antenna, electrical filter, 90 ° electrical mixer, erbium-doped fiber amplifier, optical circulator, pseudo-random sequence generator and photodetector;Its method is to utilize stimulated Brillouin scattering effect to construct the optical notch filter corresponding to the frequency of the signal to be measured, and to act on the optical frequency comb to produce spectral holes, then utilize the random demodulator assisted by photon and single-bit compressed sensing technology to reconstruct the position information of spectral hole with high probability to realize the spectrum estimation of the signal to be measured.The scheme converts the spectrum detection of the signal to be measured into the detection of the frequency-domain sparse electrical comb, and avoids the use of high-speed analog-to-digital converter through single-bit compressed sensing.

The application belongs to the technical field of single photon emitters, and relates to a radiation enhancement type single photon emitter and a preparation method, which comprise an hBN thin layer and an emitter; the emitter is arranged above the hBN thin layer, and the emitter is located within a range of 10 nm above the surface of the hBN thin layer. By utilizing the hyperbolic dispersion characteristics of the hBN thin layer, Purcell enhancement and enhancement of photon coupling output power can be realized in a wide band range. The problems of low photon coupling output efficiency and Purcell effect enhancement in the existing single photon emitter are solved. Therefore, the application range of the single photon emitter in photonics and quantum optics is expanded. Compared with the existing single photon emitter, the application has a simple structure, does not need a complex manufacturing process, and reduces manufacturing cost.