60 results about "Regenerative amplification" patented technology

An optical receiver includes: a converting unit that converts an optical signal into an electrical signal; an amplifying unit that amplifies the electrical signal; a regenerating unit that regenerates the amplified electrical signal; a correcting unit that performs correction of an error included in the regenerated electrical signal; a monitoring unit that performs monitoring of an optical current flowing through the converting unit; and a control unit that calculates a decision threshold based on a result of the correction and a result of the monitoring.

To solve the problems that OEO (Online Editing Object) repeaters in the prior art only perform unidirectional work, or cannot adapt to GPON (Gigabit-Capable PON)/EPON (Ethernet Passive Optical Network) utilization requirements due to completion of regenerative amplification of downlink continuous optical signals or completion of regenerative amplification of uplink sudden optical signals, the invention provides a bidirectional working optical-electrical-optical repeater which comprises two optical wavelength division multiplexers, two photoelectric receivers and two electro-optical transmitters; the optical wavelength division multiplexer 1 is connected with an optical network unit OLT (Optical Line Terminal) optical interface, the photoelectric receiver 1 and the electro-optical transmitter 2; and the optical wavelength division multiplexer 2 is connected with the OLT ONU (Optical Network Unit) optical interface, the photoelectric receiver 1 and the electro-optical transmitter 2. The bidirectional working optical-electrical-optical repeater provided by the invention has the advantages that the regenerative amplification of downlink continuous 2.5 Gbps optical signals and uplink sudden 1.25Gbps optical signals can be finished simultaneously; optical performance and electrical performance satisfy GPON/EPON optical network standards; and the bidirectional working optical-electrical-optical repeater can be widely applied to GPON/EPON optical networks.

The invention discloses a regenerative laser amplifier based on a slab gain medium. The regenerative laser amplifier comprises a seed light source (1), a light beam coupling module (15), a light isolation module, a regenerative resonator and a pump module. The regenerative resonator comprises the slab gain medium (11). Two end surfaces of the slab gain medium (11) are polished and are used for penetration of pump light and laser. The upper large surface and the lower large surface of the slab gain medium are connected with a cooling device, thereby realizing effective cooling. Because the slab gain medium has relatively large pump volume and relatively large heat radiation area, heat can be distributed on the whole slab gain medium (11) and furthermore high-efficiency cooling through the two large surfaces is realized, thereby realizing relatively low integral heat effect influence. Furthermore the relatively large cross section can bear higher laser pulse peak power. Therefore the regenerative laser amplifier based on the slab gain medium can realize output of amplified regenerative laser with high average power and high light beam quality.

The invention discloses a linear-cavity optical fiber regenerative amplifier, and relates to a laser. Doped fibers are adopted to replace a working substance of the traditional linear-cavity regenerative amplifier, such as laser crystals or glass; and a control circuit can regeneratively amplify signal-pulses with different energies and different wavelengths to acquire the maximum output power automatically, and the manual control of a second pockels cell is not needed any more. In the linear-cavity optical fiber regenerative amplifier, signal light passes through the working substance for multiple times, so the pump light is fully utilized and the pumping efficiency is improved. The linear-cavity optical fiber regenerative amplifier is suitable for obtaining high power or energy polarization pulse light output by passing light pulses through various doped optical fibers.

The invention provides a regenerative amplification system used for the laser amplification. The amplification system comprises a spot shaping part, a two-way import and export part and a cyclic amplification part which are connected successively. The spot shaping part is used for shaping a near field of a light beam into a desired shape. The two-way import and export part is used for injecting the light beam into the cyclic amplification part, and realizing the separation of the output light beam and input light beam from the cyclic amplification part. The cyclic amplification part is used for transmitting and amplifying the shaped light beam in a shape-preserving mode repeatedly and arbitrarily. The regenerative amplification system has the advantages of realizing the repeated and arbitrary amplification of the shaped light beam in a conformal mode and realizing the high-gain amplification and great power export and applying to a complicated laser device at the same time on the basis of a gain amplifier with a low large caliber, and simplifying a device structure greatly.

The invention discloses a regenerative amplifier device with adjustable pulse energy and time intervals, and a method for generating controllable pulses by using the regenerative amplifier device. An electro-optical Q-switch driving source is controlled through controlling a synchronous trigger, so that voltage at two ends of an electro-optical Q-switch is changed and switching of one energy storage stage and a pulse amplification stage is completed; and arbitrary control on the time intervals and the energy of the pulses in a pulse train is achieved through controlling the turn-on or turn-off time length of the electro-optical Q-switch and the time intervals of the pulse amplification stage and the next energy storage stage.

The invention provides a method for acquiring full solid state ultrashort laser pulse with high repetition frequency (1-500kHz), high pulse stability and high single pulse energy (50muJ-1mJ) and belongs to the technical field of ultrashort laser pulse. By combining a cavity dumping SESAM (Semiconductor Saturable Absorption Mirror) locking mode with a regenerative amplifier, the stability of the high repetition frequency regenerative amplifier is improved and the generation of spontaneous amplified emission (ASE) is inhibited. The frequency of a cavity dumping mode-locking laser seed source is the same as the regenerative amplifying frequency, thus the utilizing efficiency of seed light is improved. A low-power pumping (-3W) is applied to the seed source so as to reduce the heat load of a laser crystal and the SESAM and facilitate the prolonging of the seed source. Externally-picked pulse of a mode locked laser is required to add lamda/2 voltage to an electro-optic modulation crystal and the cavity dumping mode-locking laser is only required to add lamda/4 or lower voltage to the electro-optic modulation crystal so as to reduce the heat load of an electro-optic modulation drive power source to be over three fourths and facilitate the improvement on the repetition frequency of the regenerative amplifier.

The invention discloses a regeneration amplifier with a first pulse inhibition function. The regeneration amplifier comprises a seed source, a pumping source and a regeneration amplification resonant cavity, wherein the cavity comprises elements of a gain medium, a controllable electro-optic switch, wave plates and the like. When a regeneration cavity does not work, parasitic oscillation can be generated between two or multiple lenses in the cavity; and inverted particles in the gain medium are consumed, so that saturation of the gain medium is avoided. When the regeneration cavity returns to work, the first pulse which is introduced into the regeneration cavity to be amplified does not obtain the gain which is obviously higher than that of the subsequent pulse; and the first pulse effect in an output pulse sequence of an amplifier is inhibited. No addition of the element in the first pulse inhibition process is achieved; the scheme is simple; and the cost is low. Furthermore, the regenerative amplifier is wide in application range and can be applicable to gain crystal with/without a birefrigent effect and a long/short regeneration cavity regeneration amplifier; through first pulse inhibition, relatively good output pulse uniformity can be obtained; meanwhile, vulnerable elements in the cavity are protected; the service lifetime of a laser device is prolonged; and the laser processing effect is improved.

The invention discloses a low repetition frequency passively Q-switched regenerative amplification lamp-pumped pico-second laser which comprises a seed source. The seed source comprising a saturable absorber mirror used for passive Q-switching is provided with a resonant cavity and generates picosecond pulse seed light as laser light; one side of the output end of the seed source is provided with a regenerative amplification system which repeatedly oscillates the laser light entering into the seed source, an optical isolation system which prevents picosecond pulse seed light from returning to the seed source is disposed between the regenerative amplification system and the output end of the seed source; the optical isolation system is provided with a structure, the structure is capable of transferring the laser light which is oscillated repeatedly and transferred back by the regenerative amplification system to the outside world. According to the low repetition frequency passively Q-switched regenerative amplification lamp-pumped pico-second laser, a pico-second laser with a high-energy single pulse, a short pulse width and low repetition frequency can be obtained, the pico-second laser has the advantages that the cost is low and the structure is compact, moreover, no high voltage power supply is required, the mechanical stability is high.

A high power solid-state non-regenerative optical amplification system (100) for amplifying a pulsed optical beam, includes a first optical amplification crystal (C₁) and a second optical amplification crystal (C₂) for amplifying the optical beam; optical pumping elements for longitudinal pumping amplification crystals (C₁, C₂); reflective optical elements (M′₁, M′₂, . . . , M′₁₇) suitable for reflecting the optical beam so that the optical beam makes a total number of N sequential passes through the amplification crystals (C₁, C₂), wherein N is an integer and N>4. The reflective optical elements (M′₁, M′₂, . . . , M′₁₇) are placed in a configuration suitable for alternatively interleaving the sequential optical beam passes through the 1^st crystal (C₁) and through the 2^nd crystal (C₂). A solid-state laser including the amplification system, and a method for amplifying a pulsed optical beam in a two-crystal multi-pass non-regenerative amplification system are also disclosed.

The invention relates to the technical field of laser and provides a regenerative amplifier comprising a pumping component and a regenerative amplifying cavity, wherein a gain medium, a hollow opticalfiber component and an acousto-optic switch are arranged in the regenerative amplifying cavity; the hollow optical fiber component is used for extending a total optical path within the regenerative amplifying cavity and seed light is conducted thereon; the pumping assembly is used for providing energy for the gain medium; the gain medium is used for storing energy provided by the pumping component and the energy is extracted via seed light; the acousto-optic switch is used for injecting the seed light into the regenerative amplifying cavity and exporting the seed light which extracts the energy in the gain medium. In the regenerative amplifier disclosed in the invention, the hollow optical fiber module is used to extend the total optical path in the regenerative amplifying cavity, so thattime required for a laser pulse to be transmitted in the cavity for one cycle is more than 50 ns, the acousto-optic switch is enabled to be sufficient in efficiency and response time to turn on or off the laser pulse which is greater than 0.3 mm in beam diameter, requirements of the acousto-optic switch can be lowered, cost is saved and easy maintenance can be realized.