CN216355282U - Temperature-insensitive narrow-linewidth pulse laser amplifier - Google Patents
Temperature-insensitive narrow-linewidth pulse laser amplifier Download PDFInfo
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- CN216355282U CN216355282U CN202123268445.2U CN202123268445U CN216355282U CN 216355282 U CN216355282 U CN 216355282U CN 202123268445 U CN202123268445 U CN 202123268445U CN 216355282 U CN216355282 U CN 216355282U
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Abstract
The utility model discloses a temperature-insensitive narrow-linewidth pulse laser amplifier which comprises a seed light source, an isolator, a beam combiner, an active optical fiber and a filter, wherein the beam combiner is connected with a pump. The utility model adopts a special filter which has the same temperature drift characteristic with the seed light source, namely, the transmission peak of the filter curve of the filter is consistent with the central wavelength of the seed source along with the temperature change. The central wavelength of the filter transmission is consistent with the central wavelength of the seed light source at the same temperature, and the central wavelength change of the filter is synchronous with the seed source when the temperature changes, so that the pulse laser amplifier with insensitive temperature and narrow line width is realized.
Description
Technical Field
The utility model relates to the technical field of laser, in particular to a pulse laser amplifier with insensitive temperature and narrow line width.
Background
Narrow linewidth, low noise is a basic requirement of fiber lasers, and filters are usually added in the lasers to realize narrow linewidth, low noise. The filtering requires that the central wavelength of the seed light source is consistent with the central wavelength of the filter, so that the output of laser with narrow line width, high energy and low noise can be ensured. In order to ensure that the filter and the seed wavelength of the central wavelength are consistent, the filter or the seed light source needs to be controlled, for example, the temperature control of the seed light source is ensured, so that the control difficulty and the manufacturing cost of the system are increased.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide a pulse laser amplifier with insensitive temperature and narrow line width, which does not need to control a filter or a seed light source and reduces the manufacturing cost and the control difficulty.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a temperature insensitive narrow linewidth pulse laser amplifier comprises a seed light source, an isolator, a beam combiner, an active optical fiber, a pump and a filter, wherein the beam combiner is connected with the pump;
the seed light source is used for providing signal light;
the isolator is used for isolating return light;
the active optical fiber is used for amplifying pulse laser;
the pump is used for providing pump light for the active optical fiber amplifier;
the beam combiner is used for combining the signal light and the pump light and then conducting the combined light to the active optical fiber;
and at the same temperature, the transmission central wavelength of the filter is consistent with the central wavelength of the seed light source, and the central wavelength change of the filter is synchronous with the seed source when the temperature changes.
Further, the filter sequentially comprises an input collimator, a first etalon, a second etalon and a receiving collimator; the first etalon and the second etalon have the same temperature drift characteristics as the seed light source.
Further, the amplifier of the present invention is composed of a one-stage amplification or multi-stage amplification system.
Furthermore, the filter is placed in the filtering after the first-stage amplification or the filtering after the multi-stage amplification, the light after the first-stage amplification is filtered, only the central wavelength of the seed source is allowed to penetrate, and the ASE noise of other wave bands is filtered.
The utility model adopts the technical scheme and adopts a special filter, and the filter has the same temperature drift characteristic with the seed light source, namely the transmission peak of the filter curve of the filter is consistent with the central wavelength of the seed source along with the temperature change. The central wavelength of the filter transmission is consistent with the central wavelength of the seed light source at the same temperature, and the central wavelength change of the filter is synchronous with the seed source when the temperature changes, so that the pulse laser amplifier with insensitive temperature and narrow line width is realized.
Drawings
The utility model is described in further detail below with reference to the accompanying drawings and the detailed description;
FIG. 1 is a schematic view of example 1 of the present invention;
FIG. 2 is a schematic view (multi-stage enlargement) of embodiment 2 of the present invention;
FIG. 3 is a schematic view of embodiment 3 of the present invention (reverse pumping);
fig. 4 is a schematic diagram of a filter.
Detailed Description
Embodiment 1, as shown in fig. 1, a temperature-insensitive narrow-linewidth pulsed laser amplifier according to the present invention includes a seed light source 1, an isolator 2, a beam combiner 3, an active optical fiber 4, and a filter 6, where the beam combiner 3 is connected to a pump 5;
the seed light source 1 is used for providing signal light;
the isolator 2 is used for isolating return light;
the active optical fiber 4 is used for amplifying the pulse laser;
the pump 5 is used for providing pump light for the active fiber 4 amplifier;
the beam combiner 3 is used for combining the signal light and the pump light and then conducting the combined light to the active optical fiber 4;
at the same temperature, the central wavelength of the transmission of the filter 6 is consistent with the central wavelength of the seed light source 1, and the central wavelength of the filter 6 is changed synchronously with the seed light source when the temperature is changed.
Light emitted by the seed light source 1 is input into the beam combiner 3 after passing through the isolator 2, pump light generated by the pump is input into the beam combiner 3, and the seed light and the pump light input into the beam combiner 3 are input into the active optical fiber 4 after being combined, so that the seed light is amplified; because the filter 6 and the seed source have the same temperature drift characteristics, that is, the transmission center wavelength of the filter 6 is changed synchronously with the seed source when the temperature is changed, the amplified light is filtered by the filter 6 and output to always keep the characteristics of narrow line width and low noise.
Further, the etalon of the filter 6 has the same temperature drift characteristic as the seed light source 1, and for two etalons with different FSRs, the transmission peak value is aligned with the seed source at a certain temperature, that is, the transmission peak of the combined filter 6 is also aligned with the seed source, the central wavelength of the combined transmission peak is always consistent with the seed source after the temperature changes, the central wavelength of the seed source is allowed to be transmitted, ASE noise of other wave bands is filtered, and low-noise output is realized.
In embodiment 3, as shown in fig. 3, output light of a seed light source 1 is incident into an active optical fiber 4 through an isolator 2, and output light of a pump is incident into a beam combiner 3, and then is incident into the active optical fiber 4 through the beam combiner 3, and the combined seed light and the pump light realize first-stage amplification of the seed light in the active optical fiber 4; because the filter 6 and the seed source have the same temperature drift characteristics, that is, the central wavelength of the filter 6 changes synchronously with the seed source when the temperature changes, the amplified light always keeps the characteristics of narrow line width and low noise after being filtered and output by the filter 6.
Fig. 4 is a schematic structural diagram of the filter 6 according to the present invention, wherein the filter 6 sequentially includes an input collimator 61, a first etalon 62, a second etalon 63, and a receiving collimator 64; the first etalon 62 and the second etalon 63 have the same temperature drift characteristics as the seed light source 1, as an embodiment, the FSRs of the first etalon 62 and the second etalon 63 have a difference of 10% (not limited to 10%), and the first etalon 62 and the second etalon 63 are combined into a filter 6 with an FSR increased by 10 times, the transmission center wavelength of the filter 6 is consistent with the center wavelength of the seed light source 1, and the change of the center wavelength of the filter 6 is synchronous with the seed light source when the temperature changes; two collimators are used for collimation and reception of the output light and the output light.
While the utility model has been described in connection with the above embodiments, it is to be understood that the utility model is not limited to the disclosed embodiments, which are illustrative and not restrictive, and that those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (4)
1. A temperature insensitive narrow linewidth pulsed laser amplifier characterized in that: which comprises a seed light source, an isolator, a beam combiner, an active optical fiber, a pump and a filter,
the beam combiner is connected with the pump;
the seed light source is used for providing signal light;
the isolator is used for isolating return light;
the active optical fiber is used for amplifying pulse laser;
the pump is used for providing pump light for the active optical fiber amplifier;
the beam combiner is used for combining the signal light and the pump light and then conducting the combined light to the active optical fiber;
and at the same temperature, the transmission central wavelength of the filter is consistent with the central wavelength of the seed light source, and the central wavelength change of the filter is synchronous with the seed source when the temperature changes.
2. A temperature insensitive narrow linewidth pulsed laser amplifier as set forth in claim 1 wherein: the filter sequentially comprises an input collimator, a first etalon, a second etalon and a receiving collimator; the first etalon and the second etalon have the same temperature drift characteristics as the seed light source.
3. A temperature insensitive narrow linewidth pulsed laser amplifier as set forth in claim 1 wherein: it consists of a one-stage amplification or multi-stage amplification system.
4. A temperature insensitive narrow linewidth pulsed laser amplifier as set forth in claim 1 wherein: the filter is placed in the filtering after the first-stage amplification or the multi-stage amplification, the light after the first-stage amplification is filtered, only the central wavelength of the seed source is allowed to penetrate, and ASE noise of other wave bands is filtered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123268445.2U CN216355282U (en) | 2021-12-21 | 2021-12-21 | Temperature-insensitive narrow-linewidth pulse laser amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123268445.2U CN216355282U (en) | 2021-12-21 | 2021-12-21 | Temperature-insensitive narrow-linewidth pulse laser amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216355282U true CN216355282U (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123268445.2U Active CN216355282U (en) | 2021-12-21 | 2021-12-21 | Temperature-insensitive narrow-linewidth pulse laser amplifier |
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| Country | Link |
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| CN (1) | CN216355282U (en) |
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2021
- 2021-12-21 CN CN202123268445.2U patent/CN216355282U/en active Active
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