CN215955687U - Erbium ytterbium optical fiber laser device - Google Patents
Erbium ytterbium optical fiber laser device Download PDFInfo
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- CN215955687U CN215955687U CN202122571972.4U CN202122571972U CN215955687U CN 215955687 U CN215955687 U CN 215955687U CN 202122571972 U CN202122571972 U CN 202122571972U CN 215955687 U CN215955687 U CN 215955687U
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Abstract
The utility model relates to an erbium-ytterbium fiber laser device, which comprises a seed light source, a laser control unit and a laser control unit, wherein the seed light source is used for emitting signal light; the first erbium-ytterbium co-doped optical fiber is connected with the seed light source and carries out first-stage amplification; the first combiner is connected with the first erbium-ytterbium co-doped fiber; the filter is connected with the first beam combiner; the second beam combiner is connected with the filter and the first beam combiner; the second erbium-ytterbium co-doped optical fiber is connected with the second beam combiner and carries out second-stage amplification; the third combiner is connected with the second erbium-ytterbium co-doped fiber; and the first multimode pump laser is connected with the third beam combiner and used for emitting pump light. The erbium ytterbium fiber laser device of the utility model realizes high output power and high beam quality output, has peak power as high as 6KW, low ASE noise, high slope efficiency, simple device drive and control, compact structure, high environmental applicability and high reliability.
Description
Technical Field
The utility model relates to the technical field of laser, in particular to the field of fiber lasers, and particularly relates to an erbium-ytterbium fiber laser device.
Background
With the development of laser technology, lasers play more and more important roles in the fields of industry, medical treatment, sensing and the like. The 1550nmMOPA optical fiber laser has the advantages of high peak power, compact structure, strong environmental adaptability, high safety degree of human eyes, long measurement distance, high precision and the like, and is widely applied.
Because the signal light source of the MOPA fiber laser is usually directly obtained by a semiconductor laser, the signal light source can realize pulse laser output by matching with a corresponding driving circuit, and the output power of the signal light source is extremely low. In order to obtain high power output, conventional erbium-doped fiber amplifier or single-clad erbium-ytterbium co-doped fiber is usually used as the first stage amplification, and erbium-ytterbium co-doped double-clad active fiber is used as the second stage amplification. This approach can achieve high output power, however, because the EDFA requires a single-mode pump laser to supply power, it must be matched with a single-mode pump driving circuit, the laser control is more complicated, the cost is higher, and the integration is not facilitated. Meanwhile, the EDFA has low light-light conversion efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide an erbium-ytterbium fiber laser device which has high efficiency, high reliability and compact structure.
In order to achieve the above object, the erbium ytterbium fiber laser device of the present invention is as follows:
the erbium ytterbium fiber laser device is mainly characterized by comprising the following components:
a seed light source emitting signal light;
the first erbium-ytterbium co-doped optical fiber is connected with the seed light source and carries out first-stage amplification;
the first combiner is connected with the first erbium-ytterbium co-doped fiber and combines the pump light and the signal light;
the filter is connected with the first beam combiner and filters the signal light through the band-pass optical filter;
the second beam combiner is connected with the filter and the first beam combiner and is used for separating the pumping light from the signal;
the second erbium-ytterbium co-doped optical fiber is connected with the second beam combiner and carries out second-stage amplification;
the third beam combiner is connected with the second erbium-ytterbium co-doped fiber and combines the pumping light;
and the first multimode pump laser is connected with the third beam combiner and used for emitting pump light.
Preferably, the apparatus further comprises a first isolator connected to the seed light source and the first erbium ytterbium co-doped fiber at two ends, respectively, for preventing backward ASE from entering the seed light source.
Preferably, the apparatus further comprises a second isolator, both ends of which are respectively connected to the first combiner and the filter, for preventing backward ASE light amplified by the second stage from entering the first erbium-ytterbium co-doped fiber.
Preferably, the device further comprises a third isolator, the input end of the third isolator is connected with the third beam combiner, and the output end of the third isolator is connected with the output optical fiber of the laser, so that backward return light is prevented from entering the laser.
Preferably, the device further includes a second multimode pump laser connected to the third beam combiner, and the alarm is activated when the pump is abnormal.
The erbium ytterbium fiber laser device can realize high output power and high beam quality output without adopting the technical scheme of taking the traditional EDFA as primary amplification, has peak power as high as 6KW, low ASE noise, high slope efficiency, simple device driving and controlling, compact structure, high environmental applicability and high reliability.
Drawings
Fig. 1 is a schematic diagram of an erbium ytterbium fiber laser device according to the present invention.
Fig. 2 is a schematic circuit diagram of a fiber laser according to an embodiment of the present invention.
Detailed Description
In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.
In the technical solution of the erbium ytterbium fiber laser device of the present invention, what is mainly protected is a hardware structure and connection relationship thereof supporting an overall hardware functional platform for implementing corresponding functions, and each of the functional modules and module units included therein can correspond to a specific hardware circuit in an actually known hardware device or integrated circuit structure, so that only the improvement of a specific hardware topology connection structure and a specific hardware circuit is involved, and the improvement of a hardware portion exists, and does not depend on only computer control software, and does not belong to a carrier for executing only control software or a computer program, so as to solve the corresponding technical problem and obtain the corresponding technical effect, and not involve any application of control software or a computer program, that is, the present invention can solve the technical problem to be solved only by using the improvement in the actually known hardware device or hardware circuit structure involved in these modules and units, and achieve the corresponding technical effects without the assistance of specific control software or computer programs to realize the corresponding functions.
The erbium ytterbium fiber laser device of the utility model comprises:
a seed light source emitting signal light;
the first erbium-ytterbium co-doped optical fiber is connected with the seed light source and carries out first-stage amplification;
the first combiner is connected with the first erbium-ytterbium co-doped fiber and combines the pump light and the signal light;
the filter is connected with the first beam combiner and filters the signal light through the band-pass optical filter;
the second beam combiner is connected with the filter and the first beam combiner and is used for separating the pumping light from the signal;
the second erbium-ytterbium co-doped optical fiber is connected with the second beam combiner and carries out second-stage amplification;
the third beam combiner is connected with the second erbium-ytterbium co-doped fiber and combines the pumping light;
and the first multimode pump laser is connected with the third beam combiner and used for emitting pump light.
In a preferred embodiment of the present invention, the apparatus further comprises a first isolator connected to the seed light source and the first erbium ytterbium co-doped fiber at two ends to prevent backward ASE from entering the seed light source.
In a preferred embodiment of the present invention, the apparatus further comprises a second isolator, both ends of which are respectively connected to the first combiner and the filter, for preventing backward ASE light amplified in the second stage from being incident on the first erbium ytterbium co-doped fiber.
As a preferred embodiment of the present invention, the apparatus further includes a third isolator, an input end of the third isolator is connected to the third beam combiner, and an output end of the third isolator is connected to an output optical fiber of the laser, so as to prevent backward light from entering the laser.
As a preferred embodiment of the present invention, the apparatus further includes a second multimode pump laser, connected to the third beam combiner, and configured to enable an alarm when the pump is abnormal.
In a specific embodiment of the utility model, an EYDCF-based two-stage MOPA fiber laser is provided, which can realize high output power and high signal-to-noise ratio output of laser by adopting an EYDCF bridging scheme, and has high optical-to-optical conversion efficiency and slope efficiency.
The device has the following structure:
a seed light source: providing signal light to a laser;
the first isolator ISO1 prevents the last ASE from entering the seed light source in the working process of the laser, and plays a role in protecting the seed light source;
first erbium ytterbium co-doped fiber: the low-doped thin-core erbium-ytterbium co-doped double-clad active fiber;
a first combiner: the active optical fiber beam combiner combines the pump light and the signal light;
a second isolator ISO2 for preventing backward ASE light generated by the second stage amplifier from entering the first stage optical amplifier;
a filter: a band-pass optical filter for filtering the signal light;
a second combiner: the pump beam combiner is used for separating pump light from signals;
second erbium ytterbium co-doped fiber: the highly-doped thick-core erbium-ytterbium co-doped double-clad active fiber;
multimode pump laser: the multimode pump laser provides energy for laser amplification;
a third isolator ISO3 prevents backward light from entering the laser.
The working mode is as follows:
in the signal light transmission process, the gain medium absorbs the energy of the pump light, and the signal amplification is realized through atom stimulated radiation. The specific transmission paths of the signal light and the pump light are as follows:
pulsed laser light emitted by the seed light source enters the first erbium-ytterbium co-doped fiber through the first isolator, is amplified by the first erbium-ytterbium co-doped fiber, enters the second erbium-ytterbium co-doped fiber through the first beam combiner, the second isolator, the filter and the second beam combiner, is subjected to secondary amplification, and is output through the third beam combiner and the third isolator after being amplified.
The pump laser emitted by the pump laser enters the second erbium-ytterbium co-doped fiber through the third beam combiner, and the residual pump light in the second erbium-ytterbium co-doped fiber is separated through the second beam combiner and then enters the first erbium-ytterbium co-doped fiber through the first beam combiner to realize the energy supply for laser signal amplification.
The innovation points are as follows:
1. EYDCF with low doping concentration is used as the first-stage amplification of the laser, and energy supply can be realized by adopting a multimode pump laser, so that the requirement that a single-mode pump and multimode pump double pump laser and a driver are required for amplifying the traditional EDFA is avoided. The control difficulty of the laser is greatly simplified, the material cost is reduced, and meanwhile, the slope efficiency and the light-light conversion efficiency of the equipment are effectively improved.
2. By adopting the technical scheme of pump bridging, the residual pump of the second-stage amplifying part is directly led into the first-stage amplifier as pump energy, on one hand, the first-stage amplifier can be satisfied by only adopting one pump, and the energy is supplied to the second-stage amplifier, so that the utilization rate of devices is effectively improved, the cost is reduced, and the production and debugging time is saved. On the other hand, it needs to carry out the pump light that remains the processing through the pump stripper with among the traditional power amplifier and carries out recycle, for the first order enlargies the energy supply, effectively improves the pumping utilization efficiency. The electro-optic conversion efficiency of the device is improved.
3. Adopt the dual pump to carry out moist surplus design, only unanimous pumping is the laser instrument energy supply when equipment is normal, when the pumping is unusual, starts another pumping, and equipment is reported an emergency and asked for help or increased vigilance simultaneously, the reliability of lifting means.
Fig. 2 is a schematic diagram of the optical path of a fiber laser complete with the embodiment of the present device. The complete high-power optical laser solution is obtained by the output light detection function of the main optical path and the corresponding software and hardware control.
The erbium ytterbium fiber laser device can realize high output power and high beam quality output without adopting the technical scheme of taking the traditional EDFA as primary amplification, has peak power as high as 6KW, low ASE noise, high slope efficiency, simple device driving and controlling, compact structure, high environmental applicability and high reliability.
In this specification, the utility model has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the utility model. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (5)
1. An erbium ytterbium fiber laser device, the device comprising:
a seed light source emitting signal light;
the first erbium-ytterbium co-doped optical fiber is connected with the seed light source and carries out first-stage amplification;
the first combiner is connected with the first erbium-ytterbium co-doped fiber and combines the pump light and the signal light;
the filter is connected with the first beam combiner and filters the signal light through the band-pass optical filter;
the second beam combiner is connected with the filter and the first beam combiner and is used for separating the pumping light from the signal;
the second erbium-ytterbium co-doped optical fiber is connected with the second beam combiner and carries out second-stage amplification;
the third beam combiner is connected with the second erbium-ytterbium co-doped fiber and combines the pumping light;
and the first multimode pump laser is connected with the third beam combiner and used for emitting pump light.
2. The erbium ytterbium fiber laser device of claim 1, further comprising a first isolator connected to the seed source and the first erbium ytterbium co-doped fiber to prevent backward ASE from entering the seed source.
3. The erbium ytterbium fiber laser device of claim 1, further comprising a second isolator coupled to the first combiner and the filter to prevent backward ASE light amplified in the second stage from entering the first erbium ytterbium co-doped fiber.
4. The erbium ytterbium fiber laser device of claim 1, further comprising a third isolator having an input end coupled to the third combiner and an output end coupled to the output fiber of the laser to prevent backward feedback light from entering the laser.
5. The erbium ytterbium fiber laser device of claim 1, further comprising a second multimode pump laser coupled to the third combiner for alarming when the pump is abnormal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116053905A (en) * | 2023-03-17 | 2023-05-02 | 上海拜安实业有限公司 | Optical fiber laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116053905A (en) * | 2023-03-17 | 2023-05-02 | 上海拜安实业有限公司 | Optical fiber laser |
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