30 results about "Dissipative soliton" patented technology

The invention belongs to the technical field of photoelectric equipments, in particular to a device capable of generating various optical solitons. The optical soliton generation device based on a passive mode-locked ytterbium-doped fiber laser comprises a polarization controller (1), a 1*N optical switch (2), an optical fiber group (3), a 1*N optical coupler (4), a dispersion compensation fiber (5), an optical isolator (6), a ytterbium-doped fiber, a light wavelength division multiplexing (8), a pump light source (9), a saturable absorber (10) and a 1*2 optical coupler (1). In the same passive mode-locked ytterbium-doped fiber laser system, the optical soliton generation device based on the passive mode-locked ytterbium-doped fiber laser is capable of obtaining parabolic dissipative soliton single-pulse optical solitons, hyperbolic secant-shaped soliton single-pulse optical solitons, bounded multi-soliton optical solitons of the two optical pulses and other optical solitons; when switching between different types of solitons, a user does not need to change a light path structure, and the switching speed is very fast.

The invention discloses a multi-purpose bidirectional passive mode-locked full-fiber laser system and aims to solve a technical problem that it is difficult for a convention fiber laser device to output two types of ultra-short optical pulses simultaneously. The system comprises a pumping source (1), a wavelength division multiplexer (2), an erbium-doped gain fiber (3), a 2*2 output coupler (4), a first 3dB optical coupler (5), a second 3dB optical coupler (6), a first polarization-dependent isolator (7), a first polarization controller (8), a second polarization-dependent isolator (9), a second polarization controller (10), a dispersion compensation fiber (11) and a single-mode fiber (14). The 2*2 output coupler (4) outputs a bidirectional mode-locked pulse. The first output end (12) of the 2*2 output coupler (4) is connected with the single-mode fiber (14) located outside a cavity and is used for the out-of-cavity time-domain compression of the output pulse to obtain a high-peak-power ultra-short pulse. The second output end (13) of the 2*2 output coupler (4) directly outputs a high-energy dissipative soliton resonance pulse. The system is low in cost and wide in application range, and can be used as a high-peak-power femtosecond pulse light source and a high-energy picosecond and nanosecond pulse light source, and can also be used as a seed source of a high-energy pulse amplifier.

The invention provides a 980nm dissipative soliton mode-locked laser, and relates to the technical field of laser, aiming at solving the problems that existing lasers are realized in a way of space coupling, so that a system is low in coupling efficiency and poor in stability. The 980nm dissipative soliton mode-locked laser comprises a wavelength division multiplexer, a gain fiber, an isolator, a coupling output element, a band-pass filter, a first polarization controller and a second polarization controller, wherein the wavelength division multiplexer, the gain fiber, the band-pass filter, the first polarization controller, the isolator, the second polarization controller are connected with the coupling output element in sequence of optical fiber, so that a full-optical fiber ring-shaped cavity is formed. After the 980nm dissipative soliton mode-locked laser is adopted, stable dissipative soliton mode-locked pulse output can be realized, the mode locking repeat frequency is 20.38MHz, the maximum output power is 26.1mW, a mode locking threshold value is 170mW, and the pulse width is 70-80ps; the 980nm dissipative soliton mode-locked laser not only can generate blue light of about 490nm by frequency multiplication, but also can serve as a light source with high brightness and long service life, and can be taken as a pumping source of an erbium-doped amplifier.

The invention provides a 1[mu]m dissipative soliton mode-locked laser, relating to the technical field of laser and aiming at solving the problems that the coupling efficiency of a system is low, the size of space coupling equipment is huge, the system stability is poor and the actual application is not facilitated because the existing device adopts a space coupling method. The 1[mu]m dissipative soliton mode-locked laser comprises a wavelength division multiplexer, gain fibers, an isolator, a coupling output element, a band-pass filter, a first polarization controller and a second polarization controller, wherein the wavelength division multiplexer, the gain fibers, the band-pass filter, the first polarization controller, the isolator and the second polarization controller are sequentially connected with the coupling output element through optical fibers to form an all-fiber ring cavity, and the length of the gain fibers is arranged to be length for enabling the laser to realize four-level oscillation starting. The 1[mu]m dissipative soliton mode-locked laser not only can be used as a high-brightness and high-beam-quality pumping source for a high-power ytterbium-doped laser, but also can further improve the output power of the ytterbium-doped laser and has a potential of being applied to cold light magnification.

The invention discloses a dissipation soliton active mode-locking fiber laser, and relates to the field of a laser. The laser comprises a strength modulator and a code pattern generator, which are mutually connected, wherein the code pattern generator inputs pulse sequence signals to the strength modulator; and the strength modulator is used for modulating under the driving of the pulse sequence signals. The dissipation soliton active mode-locking fiber laser provided by the invention inputs the pulse sequence signals to the strength modulator by using the code pattern generator, so as to modulate laser pulse. Furthermore, the high-energy mode-locking laser pulse output can be obtained, and the center wavelength of the output laser pulse can be moved within a large range; and the output laser pulse has flexible and adjustable pulse repeat frequency, and can accurately align an external clock.

The invention belongs to the technical field of the fiber optic lasers and in particular relates to a device capable of generating a plurality of types of optical solitons. The structure of the device comprises a 1*N optical switch (1), a dispersion-compensation optical fiber group (2), a 1*N optical coupler (3), a saturable absorber (4), a single mode optical fiber (5), an optical coupler (6), a ytterbium doped fiber (7), a light wavelength division multiplexer (8), a pump light source (9), an adjustable optical fiber (10) and a 1*2 optical coupler (11). The device is capable of obtaining a plurality of types of optical solitons such as scattered soliton monopulse, ordinary optical soliton monopulse and bound-state multi-solitons of the two optical pulses by selecting the dispersion-compensation optical fibers different in length; the environmental parameters of the system are not changed during switching between different optical pulses, and the device is high in switching speed, convenient to use and good in repeatability.

The invention provides a resonant mode-locked fiber laser based on 2Mum dissipative solitons. The resonant mode-locked fiber laser comprises a pumping source and an annular fiber cavity. The annular fiber cavity is formed by connection of a wavelength division multiplexer, a thulium-doped fiber, an optical isolator, a fiber coupler, a filter and a fiber nonlinear annular reflector through single-mode fibers. The fiber nonlinear annular reflector is formed by connecting two output ports of the fiber coupler through a fluoride (ZBLAN) ultra-flat dispersion compensation photonic crystal fiber. The resonant mode-locked fiber laser has the advantages that the fiber laser of an all-fiber structure has high beam quality, and is convenient for fusion and convenient to maintain; the fiber laser canoutput 2Mum dissipative soliton resonance pulses by adjusting pumping lights and characteristics of different parameters in the cavity.

The invention discloses a high-energy dissipative soliton resonance rectangular pulse generating system, which comprises: a 9-shaped resonant cavity based on a nonlinear amplifying annular mirror mode-locking technology, a double-clad thulium-doped optical fiber pre-amplifier, and a double-clad thulium-doped optical fiber main power amplifier, wherein the 9-shaped resonant cavity is connected to the pre-amplifier; the pre-amplifier is connected with the main power amplifier; the 9-shaped resonant cavity is configured to generate a dissipative soliton resonance rectangular pulse which is pre-amplified by the pre-amplifier and transmitted to the main power amplifier to be subjected to power amplification such that the high-energy dissipative soliton resonance rectangular pulse is obtained. The dissipative soliton resonance rectangular pulse can be obtained through the resonant cavity, and then is subjected to the power amplification by an optical fiber amplifier, thereby obtaining the high-energy dissipative soliton resonance rectangular pulse, and outputting a high-energy rectangular laser pulse with an adjustable pulse width.

The invention belongs to the optical soliton technology field and particularly relates to an optical soliton pulse generator formed by an erbium-doped-fiber laser. The optical soliton pulse generator formed by erbium-doped-fiber laser comprises a 1*2 optical coupler (1), a 1*N optical switch (2), an optical fiber group (3), a 1*N optical coupler (4), a saturable absorber (5), an optical isolator (6), an erbium-doped fiber (7), an optical wavelength division multiplexer (8), a pump light source (9) and a polarization controller (10). According to the optical soliton pulse generator formed by the erbium-doped-fiber laser, soliton in multiple types such as a ground state optical soliton pulse and a dissipation soliton pulse and bound state multi-soliton of the ground state optical soliton pulse and the dissipation soliton pulse can be obtained in the same passive mode-locking erbium-doped fiber laser system, the performance is stable, and the repeatability is good.

The invention discloses a period bifurcation dissipative soliton resonance pulse fiber laser, which comprises a pump source, a wavelength division multiplexing coupler, a ytterbium-doped gain fiber, an isolator, a first output coupler, a first polarization controller and a fiber nonlinear ring reflector. The output end of the pump source is connected with the input end of the wavelength division multiplexing coupler; and the wavelength division multiplexing coupler, the ytterbium-doped gain fiber, the isolator, the first output coupler, the first polarization controller and the fiber nonlinearring reflector are connected in sequence to form a fiber ring cavity. The fiber nonlinear ring reflector comprises a second output coupler. A single-mode fiber and a second polarization controller are connected between two output ports of the second output coupler; and two input ports of the second output coupler are connected with the first polarization controller and the wavelength division multiplexing coupler respectively. The invention also discloses a period bifurcation dissipative soliton resonance pulse generation method. The method realizes period bifurcation dissipative soliton resonance pulse optical pulse output.