11 results about "Raman pump" patented technology

This invention discloses a multi-wavelength Brillouin and Raman random fiber laser based on tunable broadband Raman pumping, comprising a 1.5μm Brillouin pump, a 1.45μm tunable broadband Raman pump, a wavelength division multiplexer (WDM) I, and a passive fiber. The 1.45μm tunable broadband Raman pump includes a wavelength-tunable cascaded random Raman fiber laser, a WDM II, and a single-mode fiber I. The wavelength-tunable cascaded random Raman fiber laser is injected into the single-mode fiber I through the WDM II. This multi-wavelength Brillouin and Raman random fiber laser based on tunable broadband Raman pumping provides a 1.45μm tunable broadband Raman pump source by back-Raman amplification of the broadband seed light. Working together with the 1.5μm Brillouin pump, it can achieve ultra-wideband multi-wavelength random fiber laser output. By simultaneously tuning the output wavelengths of the Brillouin pump and the Raman pump, wavelength tuning of the broadband multi-wavelength random fiber laser can be achieved.

Disclosed herein are fiber-based Raman amplifier systems and methods of generating broadband pump light using a fiber Bragg grating (FBG) including a plurality of gratings. In the disclosed system and method, each of the plurality of gratings includes a central wavelength ([lambda] C) corresponding to a wavelength of an output from a laser, respectively, where the central wavelengths ([lambda] C) of at least two gratings of the plurality of gratings are different from each other. Further disclosed are systems and methods of using a pump source, where the pump source includes a plurality of the lasers that are optically connected to a plurality of the FBGs, respectively, where at least two of the FBGs have the same FBG design as a plurality of the gratings.

An automated portable Raman microscope combines the simplicity, ruggedness, and selectivity of Raman spectroscopy with the sensitivity of single-particle identification. It includes a visible camera, controllable illumination, and a moving optical head that together acquire images of the sample at different focal planes and under different lighting conditions. An internal processor automatically identifies particles or other targets in these images for Raman analysis, e.g., shifted excitation difference Raman spectroscopy. The moving optical head scans the Raman pump beam across the sample to different targets. A built-in user interface displays the results of the Raman analysis superimposed on visual images of the sample. The Raman microscope's simplicity, reliability, and low maintenance make it easy to use for a wide variety of applications, including analyzing and identifying particles and residues, linking chemical and biometric evidence, and forensics analysis.

A system comprising a fiber optic cable, a first passive optical device, a first wavelength division multiplexer 1300 (WDM), a second WDM 1300, a first Raman pump 1100, a second Raman pump 1500, a sec

An optical amplifier, a related method, and a device. The optical amplifier provided in embodiments includes a lumped gain medium, configured to: amplify an input optical signal of the optical amplifier to obtain a target optical signal, and output the target optical signal to a first multiplexer / demultiplexer; a first Raman pump unit, configured to: emit first Raman pump light, and output the first Raman pump light to the first multiplexer / demultiplexer, where the first Raman pump light is used to amplify the target optical signal; and the first multiplexer / demultiplexer, configured to couple the target optical signal and the first Raman pump light, to obtain output light of the optical amplifier.

Systems and methods for measuring Raman gain in an optical span include, subsequent to determining a baseline measurement of a first total-power output at an upstream node and a first total-power input at a downstream node, causing a measurement a second total-power output at the upstream node and a second total-power input at the downstream node with one or more Raman pump lasers on; and determining a Raman gain for the optical span by comparing (a) a difference between the first total-power output and the first total-power input to (b) a difference between the second total-power output and the second total-power input. The baseline measurement was determined when one or more Raman pump lasers associated with the optical span were turned off. The Raman gain reflects an effective gain achieved over all of the optical span rather than only at a local amplifier input.

Disclosed herein are fiber-based Raman amplifier systems and methods of producing a broadband pump light utilizing a fiber Bragg grating (FBG) including a plurality of gratings. In disclosed systems and methods, the plurality of gratings each include a center wavelength (λC) corresponding, respectively, to a wavelength of an output from a laser, wherein the center wavelength (λC) of at least two gratings of the plurality of gratings are different from each other. Further disclosed are systems and methods using a pump source, where the pump source includes a plurality of the lasers optically connected, respectively, to a plurality of the FBGs, where at least two of the FBGs have a same FBG design with a plurality of the gratings.

A system comprising a fiber optic cable, a first passive optical device, a first wavelength division multiplexer 1300 (WDM), a second WDM 1300, a first Raman pump 1100, a second Raman pump 1500, a sec

The invention provides a terahertz light source based on gas stimulated Raman pumping optical difference frequency, which comprises an Nd: YAG laser, a stimulated Raman gas cell and a nonlinear optical crystal which are sequentially arranged, a first lens is arranged between the Nd: YAG laser and the stimulated Raman gas cell, and a second lens is arranged between the Nd: YAG laser and the stimulated Raman gas cell. A second lens is arranged between the stimulated Raman gas cell and the nonlinear optical crystal; laser emitted by the Nd: YAG laser enters the stimulated Raman gas cell, first laser and second laser are generated through a stimulated Raman process, the wavelength of the first laser is lambda1, the wavelength of the second laser is lambda2, and the first laser and the second laser generate an optical parameter difference frequency effect in the nonlinear optical crystal to generate terahertz light. The terahertz light source is simple in structure, large in output energy and high in stability.

The invention relates to the technical field of optical communication, and provides a Raman transmission system which comprises a first performance convergence unit, a first optical path subunit, a second optical path subunit and a second performance convergence unit. According to the method, the optimal backward Raman pumping power value is determined by reducing the output power of the power amplifier and the pumping power value of the forward Raman amplifier and comparing service performance parameters of a receiving end; and then the output power of the power amplifier and the pumping power of the forward Raman amplifier are respectively adjusted according to a preset rule until the service performance parameters are not degraded any more, and the optimal output power of the power amplifier and the optimal pumping power of the forward Raman amplifier are obtained. According to the embodiment of the invention, by adjusting the power of different amplifiers and simulating different states of transmission lines, the optimal power value of each amplifier is accurately obtained, the optimal transmission performance of the system is determined, the problem that the Raman transmission system engineering is debugged by experience when being opened can be solved, and the opening time of the Raman system is greatly saved.

Disclosed herein are methods and systems for automatically configuring a raman amplifier. One exemplary system may be provided with the raman amplifier, a user device, and a network administration device. A processor of the network administration device executes instructions that cause the network administration device to generate a machine learning model using machine learning techniques and deploy the machine learning model to a controller of the raman amplifier. When a desired gain profile is communicated from the user device to the controller of the raman amplifier, instructions stored in non-transitory computer readable memory cause a processor of the controller to automatically assess the desired gain profile using the machine learning model to determine raman pump configurations for each of a plurality of raman pumps of the raman amplifier and send the determined raman pump configurations to each of the plurality of raman pumps of the raman amplifier.