CN214379240U

CN214379240U - Annular cavity regeneration laser amplifier

Info

Publication number: CN214379240U
Application number: CN202120714488.XU
Authority: CN
Inventors: 曹宇; 林秀玉; 游伟琳; 林海
Original assignee: Fuzhou Nafei Photoelectric Technology Co ltd
Current assignee: Fuzhou Nafei Photoelectric Technology Co ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-10-08
Anticipated expiration: 2031-04-08

Abstract

The utility model discloses an annular cavity regeneration laser amplifier, which comprises a first polarization beam splitter prism, an electro-optic crystal, a second polarization beam splitter prism, a first 45-degree reflector, a gain crystal and a second 45-degree reflector which are connected in sequence, wherein seed laser is input through the first polarization beam splitter prism, the laser polarization direction is changed into S polarization after voltage is applied to the electro-optic crystal for the first time, the seed laser is reflected by the second polarization beam splitter prism for 90 degrees and then enters the gain crystal, the seed laser is reflected by the first 45-degree reflector and returns to the first polarization beam splitter prism through the second 45-degree reflector, the polarization direction is unchanged when passing through the electro-optic crystal without voltage, and the electro-optical crystal applies voltage for the second time after the amplification reaches the preset energy, so that the polarization direction of the passing laser is changed into P polarization, and the P polarization is output from the second polarization beam splitter prism. The utility model has the advantages of simple overall structure, few using devices, low manufacturing cost and capability of amplifying laser energy efficiently.

Description

Annular cavity regeneration laser amplifier

Technical Field

The utility model relates to a laser technical field especially relates to an annular chamber regeneration laser amplifier.

Background

The conventional regenerative laser amplifier has two typical configurations, the first configuration is shown in fig. 1, and two pockels cells (PC1, PC2) are used, one for locking the incident seed light in the regenerative amplification cavity and the other for releasing the amplified laser light out of the cavity.

The second structure is shown in fig. 2, and uses 1 pockels cell to lock the incident seed light in the regenerative amplification resonant cavity, and uses the same pockels cell and a faraday isolator to guide the amplified laser out of the resonant cavity.

Common to both of these exemplary structures is the use of two mirrors (M1, M2) to form a resonant cavity between which the laser light travels and amplifies. However, the regenerative laser amplifiers of the two structures use more devices, have complex structures and high cost. For the amplification of high-energy laser light, more devices means a greater risk of damage and a lower reliability of the device.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, an object of the utility model is to provide an annular chamber regeneration laser amplifier, when guaranteeing the performance of high-energy amplification, its overall structure is simple, the use device is few, low in manufacturing cost no longer need use the isolator to derive laser when enlargiing, can amplify laser energy by the efficient.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an annular chamber regeneration laser amplifier, includes consecutive first polarization beam splitter prism, electro-optic crystal, second polarization beam splitter prism, first 45 degrees speculum, gain crystal and second 45 degrees speculums, and seed laser is inputed through first polarization beam splitter prism, and the first process laser polarization direction becomes S polarization after the electro-optic crystal applys voltage, and laser after the polarization process 90 degrees reflection behind the second polarization beam splitter prism is again by first 45 degrees speculum reflection entering gain crystal, follow gain crystal through second 45 degrees speculum reflection returns to first polarization beam splitter prism, and the polarization direction is unchangeable when passing through the electro-optic crystal that does not applys voltage to in cavity circulation propagation enlargies, after circulation propagation enlargies and reaches predetermined energy, the electro-optic crystal applys voltage for the second time and makes the laser polarization direction that passes through become P polarization, and the second polarization beam splitter prism outputs the light beam.

Further, the first polarization beam splitter prism and the second polarization beam splitter prism transmit P-polarized light and reflect S-polarized light.

Further, the seed laser is P-polarized pulse light.

Further, a half-wave voltage is intermittently applied to the electro-optical crystal to polarize the laser.

Furthermore, the circulating propagation amplification times of the seed laser are set according to requirements, and the control is realized by applying or eliminating voltage on the electro-optical crystal.

Further, the gain crystal is connected with a pump laser.

The utility model discloses following beneficial effect has:

1. the utility model has the advantages that the whole structure is simple, the used devices are few, and the manufacturing cost is low by arranging the annular light path consisting of the first polarization beam splitter prism, the electro-optic crystal, the second polarization beam splitter prism, the first 45-degree reflector, the gain crystal and the second 45-degree reflector; when the laser is amplified, an isolator is not needed to lead out the laser, and the laser energy can be efficiently amplified.

2. The utility model discloses a setting can make laser polarization direction become the electro-optic crystal of S polarization after applying voltage, and laser passes through when not applying voltage electro-optic crystal polarization direction is unchangeable, through exerting voltage as required controllability on the electro-optic crystal, just can be accurate conveniently carry out laser amplification energy control.

Drawings

FIG. 1 is a schematic diagram of a prior art regenerative laser amplifier;

FIG. 2 is a schematic diagram of a second prior art regenerative laser amplifier;

fig. 3 is a schematic structural diagram of the ring cavity regenerative laser amplifier of the present invention.

Description of reference numerals:

1. a first polarization splitting prism; 2. an electro-optic crystal; 3. a second polarization beam splitter prism; 4. a first 45 degree mirror; 5. a gain crystal; 6. a second 45 degree mirror.

Detailed Description

The invention will be described in further detail with reference to the following drawings and specific embodiments:

referring to fig. 3, an annular cavity regenerative laser amplifier includes a first polarization beam splitter prism 1, an electro-optic crystal 2, a second polarization beam splitter prism 3, a first 45-degree reflector 4, a gain crystal 5, and a second 45-degree reflector 6, which are connected in sequence, a seed laser is input through the first polarization beam splitter prism 1, a laser polarization direction is changed into S polarization after a voltage is applied to the electro-optic crystal 2 for the first time, the polarized laser is reflected by the second polarization beam splitter prism 3 for 90 degrees, and then is reflected by the first 45-degree reflector 4 to enter the gain crystal 5, and is reflected back to the first polarization beam splitter prism 1 from the gain crystal 5 through the second 45-degree reflector 6, and then the polarization direction is unchanged when passing through the electro-optic crystal 2 without voltage application, so that the cyclic propagation amplification is performed in a cavity, and after the cyclic propagation amplification reaches a predetermined energy, the electro-optical crystal 2 applies a voltage for the second time to change the polarization direction of the passing laser light into P polarization, and outputs the P polarization from the second polarization splitting prism 3.

The first polarization beam splitter prism 1 and the second polarization beam splitter prism 3 transmit the P polarized light and reflect the S polarized light.

The seed laser is P-polarized pulse light.

And a half-wave voltage is intermittently applied to the electro-optical crystal 2 to polarize the laser. The number of times of cyclic propagation amplification of the seed laser is set according to requirements, and control is achieved by applying or eliminating voltage on the electro-optical crystal 2.

The gain crystal 5 is connected with a pump laser, and the pump laser is used for amplifying laser energy circularly propagated in the cavity. According to the requirement, the related devices can be replaced by optical fiber devices to form the optical fiber ring cavity regenerative amplifier.

The above only is the detailed implementation manner of the present invention, not limiting the patent scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An annular cavity regenerative laser amplifier, comprising: including consecutive first polarization beam splitter prism (1), electro-optic crystal (2), second polarization beam splitter prism (3), first 45 degrees speculum (4), gain crystal (5) and second 45 degrees speculum (6), the seed laser is inputed through first polarization beam splitter prism (1), passes through for the first time laser polarization direction becomes S polarization after electro-optic crystal (2) applys voltage, and the laser after the polarization passes through 90 degrees reflections behind second polarization beam splitter prism (3), is got into again by first 45 degrees speculum (4) reflection gain crystal (5), follow gain crystal (5) are through second 45 degrees speculum (6) reflection returns to first polarization beam splitter prism (1), pass through not applying voltage the polarization direction is unchangeable when electro-optic crystal (2) to in the cavity circulation propagation amplification, after the circulation propagation amplification reaches predetermined energy, the electro-optical crystal (2) applies voltage for the second time to change the polarization direction of the passing laser into P polarization, and the P polarization is output from the second polarization splitting prism (3).

2. A ring cavity regenerative laser amplifier as defined in claim 1, wherein: the first polarization beam splitter prism (1) and the second polarization beam splitter prism (3) transmit P polarized light and reflect S polarized light.

3. A ring cavity regenerative laser amplifier as defined in claim 1, wherein: the seed laser is P-polarized pulse light.

4. A ring cavity regenerative laser amplifier as defined in claim 1, wherein: and a half-wave voltage is intermittently applied to the electro-optical crystal (2) to polarize the laser.

5. A ring cavity regenerative laser amplifier as defined in claim 1, wherein: the circulating propagation amplification times of the seed laser are set according to requirements, and control is achieved by applying or eliminating voltage on the electro-optical crystal (2).

6. A ring cavity regenerative laser amplifier as defined in claim 1, wherein: the gain crystal (5) is connected with a pump laser.