WO2015058439A1

WO2015058439A1 - Light control triggered laser

Info

Publication number: WO2015058439A1
Application number: PCT/CN2013/088708
Authority: WO
Inventors: 杨中民; 甘久林; 杨小平; 徐善辉; 姜中宏
Original assignee: 华南理工大学
Priority date: 2013-10-23
Filing date: 2013-12-06
Publication date: 2015-04-30
Also published as: CN103545703B; CN103545703A

Abstract

Disclosed is a light control triggered laser, comprising a saturatable absorber, a light amplifier, a fibre circulator, a fibre optical grating, a pumping module, and main key devices are the light amplifier and the saturatable absorber, wherein the light amplifier is fully pumped and supplies a gain for the entire resonance cavity; and the saturatable absorber supplies a main loss in the resonance cavity. In an initial state, the gain in the cavity is less than the loss, and laser emission cannot be formed. A single trigger turn-on light pulse is injected into the resonance cavity, thus turning on the light control triggered laser. In a laser turn-on state, a single trigger turn-off light pulse is injected into the resonance cavity, thus turning off the laser. When the time of light pulse triggering is over, the laser recovers to a state of not being triggered to turn on, the gain in the cavity is less than the loss, a turning-off state of the laser continues to be maintained, so as to completely realize the turning-off of the light control triggered laser. The light control triggered laser of the present invention has a simple and compact structure without connecting a light control optical switch outside the cavity, and therefore, the entire structure is more stable.

Description

Light-controlled trigger laser

技术领域Technical field

The present invention relates to an optically controlled technique for triggering the generation and deactivation of a laser output, and more particularly to a laser that can be photoswitched to turn on and off.

背景技术Background technique

After several decades of development, integrated circuits have been prepared with a variety of high-integration, high-bandwidth, high-capacity integrated chips, and have been widely used in the industry, but there are many technical bottlenecks in its further development. Therefore, in the field of ultra-high-speed, ultra-high-capacity all-optical networks, integrated optical paths, and optical computing, some preliminary discussions and research have been made. At present, all-optical technologies have been used to achieve splitting, combining, combining, and Filtering, logic gates and other basic integrated optical basic units, the full light control of the light source is one of the most important key technologies, but there is still no good implementation.

At present, there are several non-optical methods for implementing the control of turning on and off the laser. One is to directly turn on and off the pump source of the laser, so that the amplification characteristic of the laser gain medium is generated and disappeared, and the control is always realized; Electrical or mechanical control means to adjust the coupling angle of the laser output so that the output power of the laser can be effectively switched between the maximum value and zero (Chinese patent) 201110043634 The third is to control the oscillation of the laser cavity by controlling the angle or reflectivity of a mirror cavity of the laser cavity. The fourth is to insert a loss controllable device in the cavity of the laser by adjusting the cavity inside the cavity. Loss, to achieve the establishment of control laser resonance conditions, thus achieving control laser on and off (Chinese patent: 201010142103 ). These technologies are controlled by mechanical adjustment or electrical control in the laser cavity to control the opening and closing of the laser. The use of these technologies increases the complexity and instability of the laser, and the opening and closing speeds are generally It is on the order of milliseconds, and the response time is completely unable to meet the application requirements of all-optical networks.

In related fields, the frontier research also has a combination of laser and external light control switches to realize the on and off of the laser signal. This is a technical solution of indirect control. In essence, the laser maintains a continuous output state and passes through Cascaded light control switch to control the transmission and output of the laser output signal (Chinese patent: 201010135631, 201210285905 The combined technical solution wastes a lot of energy, especially when the optical switch control realizes that the output signal is disconnected, the laser maintains continuous output, and the architecture of the laser cavity combined device also causes system instability.

发明内容Summary of the invention

The object of the present invention is to overcome the shortcomings of the prior art and better meet the practical needs of all-optical control lasers and all-optical networks. The invention provides an all-optical control triggering laser. The wavelength of the triggering light pulse is completely independent of the laser output wavelength, and the laser can be completely triggered to be turned on and off by a single optical pulse.

The object of the invention is achieved at least by one of the following technical solutions.

Light-controlled triggering laser, including triggering off light source module, triggering light source module, fiber coupler, saturable absorber, first fiber circulator, fiber grating, optical amplifier, pump module, second fiber circulator and laser output end ; fiber coupler, saturable absorber, The first fiber circulator and the optical amplifier are sequentially connected to form a counterclockwise resonant loop; the fiber coupler is further connected to the second port of the triggering light source module and the second fiber circulator respectively, and the second fiber circulator is One is connected to the trigger to turn off the light source module; the fiber grating is connected to the first fiber circulator, the pump module is connected to the optical amplifier, and the third port of the second fiber circulator is used as the laser output end.

Further, the pigtail output that triggers the light source module is connected to the first port of the fiber coupler, and the fourth port of the fiber coupler is connected to the input port of the saturable absorber, and the output port of the saturable absorber and the fiber circulator The first port is connected, the second port of the fiber circulator is connected to the fiber grating, the third port of the fiber circulator is connected to the input port of the optical amplifier, the optical amplifier is connected to the pump module, and the output port of the optical amplifier and the fiber coupler are The second port is connected; the third port of the fiber coupler is connected to the second port of the fiber circulator, the third port of the fiber circulator serves as the output of the entire laser, and the first port of the fiber circulator and the pigtail that triggers the light source module to be turned off The output is connected.

Further, the saturable absorber adopts a semiconductor saturable absorber in a communication band, an electroabsorption modulator or a poorly pumped semiconductor optical amplifier; when the saturable absorber is an electroabsorption modulator, the saturable absorber further Connected to the control module, the initial operating state of the saturable absorber is regulated by the control module, the control module is a voltage output controller; when the saturable absorber is a semiconductor optical amplifier, the saturable absorber is also connected to the control module The initial operating state of the saturable absorber is regulated by the control module, which is a current drive circuit.

Further, the triggering off light source module and the triggering turning on the light source module are triggering light sources of the light control triggering laser, triggering off the light source module and triggering the operating wavelength of the light source module in the optical amplifier gain spectrum and the saturable absorber absorption spectrum. Within the scope.

Further, the fiber grating is a Bragg short-period fiber grating, and the reflection center wavelength is within a comprehensive range of the optical amplifier gain spectrum and the saturable absorber absorption spectrum. Tuning of the reflected center wavelength can be performed by applying temperature or strain to the fiber grating.

Further, the fiber grating is replaced by a narrow band filter to achieve an effective selection of the starting wavelength.

Further, the optical amplifier is mainly used for providing a gain in a laser cavity, and the gain is triggered by the triggering light pulse under the effect of the cross-gain saturation effect caused by the triggering light pulse; the optical amplifier adopts a high gain coefficient erbium-doped fiber. Build an erbium-doped fiber amplifier ( EDFA), or a semiconductor optical amplifier using a commercial communication band (SOA) The pump module is mainly used to provide pumping to the optical amplifier, so that the optical amplifier can provide gain to the resonant cavity; the pumping module and the optical amplifier are used together, if the optical amplifier is a doped fiber amplifier (EDFA) The corresponding pump module is a 980 nm semiconductor diode (LD); if the optical amplifier is a semiconductor optical amplifier (SOA), the corresponding pump module is a current drive circuit.

Further, within a comprehensive range of the gain spectrum of the optical amplifier and the absorption spectrum of the saturable absorber, the single-pulse light of different working wavelengths can trigger the light-activated laser of the same channel and the same wavelength to be turned on and off. Within the combined range of the gain spectrum of the optical amplifier and the absorption spectrum of the saturable absorber, a single pulse of light can trigger the turning on and off of a plurality of (such as a hundred) different wavelength, different wavelengths of the light-controlled trigger laser.

Compared with the prior art, the present invention has the following advantages and technical effects:

( 1 The light-controlled triggering laser of the invention has a simple and compact structure, and the technical solution of the light-controlled optical switch is not required to be connected to the laser output through the cavity, so that the whole structure is more stable;

(2) The light-controlled trigger laser of the present invention requires a minimum triggering mechanism, and the pulse width of the light pulse required to trigger the turn-on and turn-off is as low as 10 ns. The trigger on and off energy consumption is as low as 0.1nJ.

(3 The light-controlled triggering laser of the invention has a fast on-off and off-going response speed, which can be as low as sub-microsecond, and the speed is much faster than the current intracavity control laser turning on and off.

( 4 The light-controlled triggering laser of the invention can be well applied to the seed source in the all-optical network, and the laser state can be turned on and off by the triggering light pulse, completely realize high-speed light control, simple operation and excellent performance. .

附图说明DRAWINGS

Figure 1 is a schematic diagram of the light-controlled trigger laser being turned on;

Figure 2 is a schematic diagram of the light-controlled trigger laser off;

Figure 3 is a schematic structural view of a light-controlled trigger laser;

Figure 4 is a graph showing the experimental results of the light-controlled trigger laser turning on;

Figure 5 is a graph showing the experimental results of the light-controlled trigger laser off;

6 is a schematic diagram of an implementation of a single-channel light-controlled trigger laser triggered by different wavelengths of light pulses;

Figure 7 is a schematic diagram of an embodiment of a single-pulse triggered multi-channel photo-controlled trigger laser.

具体实施方式detailed description

The specific embodiments of the present invention are further described below in conjunction with the drawings and examples, but the implementation and protection of the present invention is not limited thereto.

FIG. 3 is a schematic structural diagram of a light-controlled trigger laser according to the embodiment, where: 0—trigger to turn off the light source module, 1—trigger to turn on the light source module, 2—fiber coupler, 3—saturated absorber, 4—control module 5 - first fiber circulator, 6 - fiber grating, 7 - optical amplifier, 8 - pump module, 9 - second fiber circulator, 10 - laser output.

The pigtail output of the triggering light source module 1 is connected to the first port 201 of the fiber coupler 2, and the fourth port 204 of the fiber coupler 2 is connected to the input port 301 of the saturable absorber 3, the saturable absorber 3 and the control module 4, the output port 302 of the saturable absorber 3 is connected to the first port 501 of the first fiber circulator 5, and the second port 502 of the first fiber circulator 5 is connected to the fiber grating 6, the first fiber circulator 5 The third port 503 is connected to the input port 701 of the optical amplifier 7, the optical amplifier 7 is connected to the pump module 8, and the output port 702 of the optical amplifier 7 is connected to the second port 202 of the fiber coupler 2 to form a counterclockwise direction. a resonant loop; the third port 203 of the fiber coupler 2 is connected to the second port 902 of the second fiber circulator 9, the third port 903 of the second fiber circulator 9 serves as the output 10 of the entire laser, and the second fiber circulator The first port 901 of the 9 is connected to the pigtail output that triggers the shutdown of the light source module 0. In the fiber ring resonator, an optical amplifier and a saturable absorber are connected, wherein the optical amplifier 7 is effectively pumped to provide a gain; the saturable absorber 3 provides a main loss to the ring resonator; and the trigger light source module 0 is injected into the pulse light. Directly acting on the optical amplifier 7, triggering the light source module 1 to inject pulse light directly to the saturable absorber 3, and the triggering light pulse can effectively adjust the gain provided by the gain medium in the cavity and the loss introduced by the saturable absorber, and finally realize Optical triggering controls the turning on and off of the laser.

In the above light-controlled triggering laser, the pigtail that triggers the light source module is connected to the first port of the fiber coupler, and the triggering light pulse is injected into the ring resonator, and the fourth port of the fiber coupler and the saturable absorber are The input end is connected, and the saturable absorber is regulated by a control module. The output port of the saturable absorber is connected to the first port of the fiber circulator, and the second port of the fiber circulator is connected to the fiber grating to be a laser. The resonant cavity provides a narrow-band reflecting cavity mirror, and the third port of the fiber circulator is connected to the input end of the optical amplifier. The optical amplifier is regulated by a pumping module to be in an initial working state, and the output port of the optical amplifier and the second of the optical fiber coupler The ports are connected to form a counterclockwise resonant loop; the third port of the fiber coupler is connected to the second port of the other fiber circulator, and the third port of the fiber circulator serves as the output end of the entire laser. The first port of the circulator is connected to the output of the pigtail that triggers the light source module to be turned off, thereby injecting and triggering the light to be turned off. Red.

Description of the embodiments of each component:

The triggering light source module 0 and the triggering light source module 1 are trigger light sources of the light control triggering laser, and the working wavelength thereof is required to be within the gain spectrum range of the optical amplifier. In the present invention, in order to be better applied to the all-optical network, The optical communication band commercial FP-LD or DFB-LD is used as the laser light source. Such a light source can easily realize the amplitude and pulse width of the injected light pulse by pulse modulation and amplitude adjustment of the current, which can be triggered for subsequent implementation. The on and off states of the regulated laser provide a trigger light pulse.

The trigger light source module can be a common pulsed laser light source whose operating wavelength is within the gain spectrum of the optical amplifier.

The fiber coupler 2 is mainly used for coupling output laser. The fiber coupler of this example is a 2×2 fiber coupler with a center wavelength in the optical communication band and a splitting ratio of 10:90, of which two 90% of the ports are used. The components of the laser cavity, two 10% of the port as the laser output, trigger input port.

The fiber circulator is a three-port fiber circulator, and the working wavelength is in a comprehensive range of the optical amplifier gain spectrum and the saturable absorber absorption spectrum, and a suitable splitting ratio is selected, wherein two ports are used as a laser cavity. In part, the other two ports act as laser output and trigger input ports. The first fiber circulator 5 and the second fiber circulator 9 are three-port fiber circulators, and are single-pass, and can also be connected to the fiber coupler and the isolator to function as a fiber circulator.

The fiber grating 6 is a Bragg short-period fiber grating, and its reflection center wavelength can be customized within the intersection range of the optical amplifier gain spectrum and the saturable absorber absorption spectrum; the higher the reflectivity, the better the laser resonance is formed in the cavity, the fiber grating The reflectivity can achieve more than 99.9%; the narrower the reflection bandwidth, the narrower the linewidth of the output laser, the reflection bandwidth of the fiber grating can be less than 0.1nm, and the more suitable fiber grating can be selected according to the actual situation; Strain is applied to the fiber grating to tune the center wavelength of the reflection within a range.

The optical amplifier 7 is mainly used for providing a gain in the laser cavity, and the gain is controlled by the trigger light pulse under the effect of the cross-gain saturation effect caused by the triggering light pulse. An erbium doped fiber amplifier (EDFA) can be built with a high gain factor erbium doped fiber or a commercial communication band semiconductor optical amplifier (SOA).

The pumping module 8 is mainly used for providing pumping to the optical amplifier 7, so that the optical amplifier 7 can provide gain to the resonant cavity, so the pumping module 8 needs to be used together with the optical amplifier 7. If the optical amplifier 7 is selected as EDFA, then the corresponding The pump module is a 980 nm semiconductor diode (LD); if the optical amplifier 7 is selected as an SOA, the corresponding pump module is a current drive circuit.

The basic principle of the invention is as follows: in the constructed one-way ring resonator, the main device has an optical amplifier and a saturable absorber, wherein the optical amplifier is fully pumped to provide gain for the entire cavity; the saturable absorber is in the cavity Provide major losses. In the initial state, the gain provided by the optical amplifier is smaller than the loss in the entire resonant cavity. This loss is mainly caused by the absorption effect of the saturable absorber, so that laser light emission cannot be formed in the initial state.

As shown in FIG. 1 , in this initial case, a single trigger light pulse is injected into the unidirectional ring cavity, and the light pulse only acts on the saturable absorber, and the pulse width of the trigger light pulse is set to be larger than the cavity. The time required for the laser to oscillate; the amplitude of the triggering light pulse is adjusted to effectively reduce the power of the saturable absorber to absorb saturation, thereby causing the loss introduced into the cavity by the saturable absorber to be drastically reduced, and therefore, the loss in the cavity is reduced. The gain is constant, and the overall effect is that the gain of the resonant light in the cavity is greater than the loss, thereby obtaining a net gain, and oscillating in the circulator to form a laser exit. When the oscillation is established in the resonant cavity to form a laser output, a stable optical power distribution is formed in the cavity, and the saturated absorber device has a common superposition of the laser formed in the ring and the injected pulse light, and the pulse light action time ends. The saturated absorption effect of the saturated absorber is only affected by a small amount, and the loss factor still maintains a small value. The state of the laser oscillation in the cavity does not change, and the original state is maintained, thereby completely achieving the light-controlled trigger laser on, Here, the pulsed light acts only to trigger the laser to turn on. The specific experimental results are shown in Fig. 4. In the experiment, a single light pulse of 114 ns is used to fully realize the effective opening of the laser.

As shown in FIG. 2, in the state in which the laser is turned on in the above manner, a trigger light pulse is injected into the unidirectional ring resonator in reverse, and the light pulse can only act on the optical amplifier, and the pulse width of the trigger light pulse is set. Make it larger than the response time of the cross-gain saturation effect of the optical amplifier in the cavity; adjust the amplitude of the trigger light pulse to the power that can effectively cause the cross-gain saturation of the optical amplifier, and the cross-gain saturation effect of the optical amplifier causes the gain coefficient of the intracavity resonant laser to change sharply. Small, therefore, the gain in the cavity is reduced, and the loss is constant. The overall effect is that the gain of the resonant light in the cavity is smaller than the loss, thereby achieving the laser off; when the laser is turned off, the resonant light is stabilized in the cavity acting on the optical amplifier. The power disappears, which in turn causes the saturable absorption effect of the saturable absorber to disappear, and the loss factor returns to the initial maximum. At this time, the pulse light action time ends, the cross-gain saturation effect of the optical amplifier disappears, and the gain also returns to the initial maximum value. In this case, the laser completely recovers to the state of no trigger-on, the gain is less than the loss, and the laser cavity The resonant laser output cannot be formed, so that the light-controlled trigger laser is completely turned off, where the pulsed light acts only to trigger the laser off. The specific experimental results are shown in Figure 5. In the experiment, a single light pulse of 49 ns was used to fully realize the effective shutdown of the laser.

In this scheme, the wavelength of the trigger pulse light is independent of the laser wavelength of the output laser. Within the scope of action, a fixed-wavelength pulsed light can trigger the opening and closing of hundreds of lasers of different channels and different wavelengths; at the same time, pulsed light of different working wavelengths can also trigger the opening and closing of lasers of the same channel and the same wavelength. For different wavelengths of lasers, the pulse width and threshold peak power of the pulsed light trigger on and off will be slightly different.

The wavelength of the trigger pulse light is independent of the laser wavelength of the output laser. In the scope of action, pulsed light of different working wavelengths can also trigger the same channel to be turned on and off. As shown in Figure 6, different wavelengths of light pulses trigger a single channel light-controlled triggering laser scheme: where T11, T12, ..., T1m are different. The triggering of the working wavelength turns on the light source module, 14 is the m optical switch, T01, T02, ..., T0n are the triggers for the different working wavelengths to turn off the light source module, 15 is the n optical switch, and L0 is the light control trigger shown in FIG. The laser, wherein L00 is the light control trigger off port, L01 is the light control trigger open port, L02 is the laser output port, and the pulse light of different working wavelengths is connected to the L0 light control trigger laser through the optical switch (14, 15), Triggering light pulses of different wavelengths can be selected to enable the turning on and off of the laser L0.

The wavelength of the trigger pulse light is independent of the laser wavelength of the output laser. Within the scope of the action, a fixed-wavelength pulsed light can trigger the opening and closing of hundreds of different wavelength, different wavelength lasers. As shown in Figure 7, the single-pulse triggered multi-channel light-controlled triggering laser scheme is shown in which: 1 is the trigger to turn on the light source module, 12 and 13 are 1×n optical couplers, 0 is the trigger to turn off the light source module, L1, L2,... ..., Ln is a multi-channel light-controlled trigger laser as shown in FIG. 3, wherein L10, L20, ..., Ln0 are light-controlled trigger-off ports, L11, L21, ..., Ln1 are light-controlled trigger-on ports, L12, L22, ..., Ln2 are laser output ports, through a 1 × n

optical coupler

12 and 1 × n optical coupler 13, a single trigger to open and close the light connection of the pulse light to L1, L2, ..., Ln On the trigger laser, the multi-channel light-controlled trigger laser is turned on and off. For the light-controlled trigger lasers of different wavelengths, the limit pulse width and threshold peak power of the pulse light trigger on and off will be slightly different.

The specific implementation steps are further explained below:

1. Construct a light-controlled trigger laser according to the schematic diagram shown in FIG. 3 and the above device.

2. By adjusting the energy of the pumping module 8, the gain provided by the optical amplifier 7 in the cavity to the ring resonator is adjusted (appropriately large) and the driving state of the pumping module 8 is maintained.

3. By adjusting the setting of the control module 4, the loss provided by the saturable absorber 3 to the annular cavity is adjusted, so that in the initial state, the loss in the cavity is slightly larger than the gain, and the resonance cannot be realized in the cavity, and the control module 4 is maintained at this time. Drive status.

4. In the initial state, there is no resonant laser output, and the power of the laser output port 10 is zero.

5. Set the trigger to turn on the light source module 1, and inject a single light pulse into the annular cavity as the trigger to turn on the light source (in general, the pulse width of the light pulse can be as low as 10 ns, and the amplitude of the light pulse can be as low as 1 mW).

6. The triggering on process is shown in Figure 4. At this time, the laser is triggered to turn on, the laser output port 10 has laser output, the output power can reach the order of several milliwatts, the side mode suppression ratio can reach more than 50dB, and the resonant laser wavelength is from the ring. The cavity is determined independently of the wavelength of the trigger light pulse.

7. In the trigger-on state, set the trigger to turn off the light source module 0, and inject a single light pulse into the annular cavity as a trigger to turn off the light source (in general, the light pulse pulse width can be as low as 10 ns, and the light pulse amplitude can be as low as 1mW order).

8. The trigger closing process is as shown in Fig. 5. At this time, the laser is triggered to be turned off, the power of the laser output port 10 is zero, and the state of the resonant cavity is restored to the initial state, that is, the above step 4.

The present invention can be preferably implemented as described above and achieve the aforementioned technical effects.

Claims

The light-controlled triggering laser is characterized by comprising a triggering off light source module (0), a triggering light source module (1), a fiber coupler (2), a saturable absorber (3), a first fiber circulator (5), and an optical fiber. Grating (6), optical amplifier (7), pump module (8), second fiber circulator (9) and laser output (10); fiber coupler (2), saturable absorber (3), A fiber circulator (5) and an optical amplifier (7) are sequentially connected to form a counterclockwise resonant loop; the fiber coupler (2) is also respectively coupled with the triggering light source module (1) and the second fiber circulator ( 9) The second port is connected, the second fiber circulator (9) is first connected to the triggering light source module (0); the fiber grating (6) is connected to the first fiber circulator (5), and the pump module (8) Connected to the optical amplifier (7), the third port of the second fiber circulator (9) acts as a laser output (10).
The light-controlled trigger laser according to claim 1, characterized in that the pigtail output of the triggering light source module (1) is connected to the first port (201) of the fiber coupler (2), and the fiber coupler (2) The fourth port (204) is connected to the input port (301) of the saturable absorber (3), and the output port (302) of the saturable absorber (3) is connected to the first port (501) of the fiber circulator (5). The second port (502) of the fiber circulator (5) is connected to the fiber grating (6), and the third port (503) of the fiber circulator (5) is connected to the input port (701) of the optical amplifier (7). The amplifier (7) is connected to the pump module (8), the output port (702) of the optical amplifier (7) is connected to the second port (202) of the fiber coupler (2); the third port of the fiber coupler (2) (203) is connected to the second port (902) of the fiber circulator (9), the third port (903) of the fiber circulator (9) is used as the output (10) of the entire laser, and the first of the fiber circulator (9) The port is connected to the pigtail output that triggers the shutdown of the light source module (0) .
The photo-triggered laser according to claim 1, wherein the saturable absorber (3) adopts a semiconductor saturable absorber of a communication band, an electroabsorption modulator or a poorly pumped semiconductor optical amplifier; When the saturable absorber is an electroabsorption modulator, the saturable absorber (3) is also connected to the control module (4), and the initial operating state of the saturable absorber (3) is regulated by the control module (4), The control module is a voltage output controller; when the saturable absorber is a semiconductor optical amplifier, the saturable absorber (3) is also connected to the control module (4), and the initial working state of the saturable absorber (3) is controlled by the control The module (4) is adjusted, and the control module is a current driving circuit.
The light-controlled triggering laser according to claim 1, wherein the triggering off light source module (0) and the triggering light source module (1) are triggering light sources of the light-controlled triggering laser, and triggering to turn off the light source module (0) And the operating wavelength of the triggering of the light source module (1) is within a comprehensive range of the optical amplifier gain spectrum and the saturable absorber absorption spectrum.
The light-controlled triggering laser according to claim 1, wherein the fiber grating (6) is a Bragged short-period fiber grating, and the reflection center wavelength is within a comprehensive range of the optical amplifier gain spectrum and the saturable absorber absorption spectrum. .
The light-controlled triggering laser according to claim 5, wherein the fiber grating (6) is applied by temperature or strain to perform tuning of the reflection center wavelength.
A light-controlled triggering laser according to claim 1, characterized in that said fiber grating (6) is replaced by a narrow band filter.
The light-controlled triggering laser according to claim 1, wherein said optical amplifier (7) is mainly used for providing a gain in a laser cavity, and realizing a gain under the effect of a cross-gain saturation caused by a triggering light pulse. The optical amplifier (7) is an erbium doped fiber amplifier (EDFA) built with erbium-doped fiber, or a commercial communication band semiconductor optical amplifier (SOA); the pump module (8) is mainly used for Pumping the optical amplifier (7) allows the optical amplifier (7) to provide gain to the cavity; the pumping module (8) is used with the optical amplifier (7), if the optical amplifier (7) is a doped fiber amplifier (EDFA) The corresponding pump module (8) is a 980 nm semiconductor diode (LD); if the optical amplifier (7) is a semiconductor optical amplifier (SOA), the corresponding pump module is a current drive circuit.
The light-controlled triggering laser according to claim 1, wherein a single pulse light of different working wavelengths is used to trigger the opening and closing of the same in a comprehensive range of the gain spectrum of the optical amplifier and the absorption spectrum of the saturable absorber. The channel, the light-controlled trigger laser of the same wavelength.
The light-controlled trigger laser according to claim 1, wherein a single pulse light can trigger on and off a plurality of different channels within a combined range of the gain spectrum of the optical amplifier and the absorption spectrum of the saturable absorber. The light-controlled trigger lasers of different wavelengths.