KR20130109664A - Laser apparatus - Google Patents

Laser apparatus Download PDF

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Publication number
KR20130109664A
KR20130109664A KR1020120031599A KR20120031599A KR20130109664A KR 20130109664 A KR20130109664 A KR 20130109664A KR 1020120031599 A KR1020120031599 A KR 1020120031599A KR 20120031599 A KR20120031599 A KR 20120031599A KR 20130109664 A KR20130109664 A KR 20130109664A
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KR
South Korea
Prior art keywords
light
wavelength
unit
output
pump chamber
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KR1020120031599A
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Korean (ko)
Inventor
이희철
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주식회사 루트로닉
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Priority to KR1020120031599A priority Critical patent/KR20130109664A/en
Publication of KR20130109664A publication Critical patent/KR20130109664A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/1022—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/105—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
    • H01S3/1051—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length one of the reflectors being of the type using frustrated reflection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/1301—Stabilisation of laser output parameters, e.g. frequency or amplitude in optical amplifiers
    • H01S3/1302—Stabilisation of laser output parameters, e.g. frequency or amplitude in optical amplifiers by all-optical means, e.g. gain-clamping

Abstract

The present invention relates to a laser device capable of oscillating laser beams by reducing the substitution waiting time of laser beams of different wavelength bands, respectively. The laser device according to the present invention having a pump chamber and an output unit provided at one side of the pump chamber to reflect and output light has a first wavelength by switching the light that is opposed to each other with the pump chamber interposed therebetween. A first wavelength generated from the first light generator by being disposed in a transverse direction with respect to the optical axis reflected between the output part and the first light generator with a pump chamber interposed therebetween The second light generating unit for generating light of a second wavelength different from the light of the light, and the first wavelength of light and the second wavelength of light which is disposed opposite to the pump chamber with the output portion interposed therebetween is output through the output portion It characterized in that it comprises a non-linear crystal unit for converting one transmission and the other wavelength band and outputs.

Description

Laser device {LASER APPARATUS}

The present invention relates to a laser device, and more particularly, to a laser device for oscillating a laser of at least two wavelengths.

A laser device is a device for oscillating a laser beam having three characteristics, monochromatic, coherence and collimation, which are different from natural light or light emitted from a lamp.

The laser beam oscillated from such a laser device is widely used in various industrial fields because of the excellent three characteristics described above. In particular, in recent years, the laser device is oscillating a laser beam capable of selectively absorbing, reflecting and transmitting the object to be irradiated, thereby increasing its usability in the medical device field.

On the other hand, the laser device includes a pump chamber, a reflection mirror and an output mirror for oscillating a laser beam, and a Q-switching portion for oscillating a pulse laser having a short pulse width. Further, the laser device may additionally include a wavelength filter or the like for oscillating laser beams of different wavelength bands. Such a conventional laser device is disclosed in "wavelength variable laser device" of "Korean Patent Publication No. 2011-0101016". The above-mentioned prior art " wavelength variable laser device " is composed of a laser diode chip, a collimating lens, a tunable filter, and a reflecting mirror, and a phase correction plate is inserted to enable adjustment of the wavelength.

By the way, the conventional prior art "wavelength variable laser device" includes a phase compensator for changing the resonance mode wavelength in the same manner as the wavelength change selected from the wavelength variable filter and the wavelength variable filter to obtain a different wavelength band. There is a problem that can increase the cost of maintenance and increase the cost of maintenance, as well as the complexity of the structure.

Republic of Korea Patent Publication No. 2011-0101016

It is an object of the present invention to provide a laser device having an improved structure so as to oscillate laser beams of different wavelength bands, respectively.

In addition, another object of the present invention is to provide a laser device capable of oscillating a laser beam by reducing the substitution waiting time of laser beams of different wavelength bands, respectively.

According to the present invention, there is provided in the laser device having a pump chamber and an output unit provided on one side of the pump chamber for reflecting and outputting light, wherein the output unit is disposed to face each other with the pump chamber interposed therebetween. And a first light generating unit for generating light having a first wavelength by switching light reflected from each other, and an optical axis reflected between the output unit and the first light generating unit with the pump chamber interposed therebetween. A second light generating unit arranged in a horizontal direction to generate light having a second wavelength different from the light of the first wavelength generated from the first light generating unit, and disposed to face the pump chamber with the output unit therebetween; A nonlinear crystal part which converts and transmits one of the light of the first wavelength and the light of the second wavelength and the other wavelength band which is output through the output part and is incident. It is made by a laser device characterized in that.

Here, the first light generating unit includes a first mirror unit for mutually reflecting the output unit and light, and a first Q-switching switch of the light between the output unit and the first mirror unit to the light having the first wavelength. And a second mirror unit for reflecting light between the output unit and the light, and a second Q for switching the light between the output unit and the second mirror unit to light of the second wavelength. -May comprise a switching part.

Preferably, the first light generating unit and the second light generating unit may be disposed to be replaced with each other with respect to the output unit.

The laser device may be disposed at a position opposite to the output part and disposed at a light path crossing point of the first light generating part and the second light generating part opposite the output part with the pump chamber therebetween. A first beam splitter that transmits the light generated from one of the first light generator and the second light generator, and reflects the light generated from the other, and the first beam splitter between the nonlinear crystal parts The second beam splitter may further include a second beam splitter disposed to face the first beam splitter and to be transmitted by the first beam splitter and transmitted and wavelength-converted through the nonlinear crystal part.

Preferably, the second beam splitter totally reflects the light that is output through the nonlinear crystal part and is transmitted through the nonlinear crystal part so that the wavelength band is converted and the wavelength band is converted.

In addition, the laser device is disposed on one of the optical paths of the optical path of the first light generating unit and the optical path of the second light generating unit to selectively select any one of the light of the first wavelength and the light of the second wavelength. The shutter may further include a shutter.

The nonlinear crystal part may include any one of KTP (KTiOP 4 ) and LBO (LiB 3 O 3 ).

Preferably, the nonlinear crystal part may convert one of the light of the first wavelength and the light of the second wavelength into a half wavelength band of the incident wavelength and output the converted wavelength.

One of the light of the first wavelength and the light of the second wavelength may have a wavelength of 1064 nm, and the other may have a wavelength of 1319 nm or 1338 nm.

The light incident on the nonlinear crystal part may have a wavelength of 1319 nm or 1338 nm, and the wavelength band of the light converted by the nonlinear crystal part may have a wavelength of 660 nm or 670 nm.

The details of other embodiments are included in the detailed description and drawings.

Effects of the laser device according to the present invention are as follows.

First, since a laser having two wavelengths or more can be output using a single pump chamber, a shutter, and a nonlinear crystal part, usability can be increased.

Second, by simplifying the structure of the laser having more than two wavelengths by using a single pump chamber, a shutter and a nonlinear crystal part, it is possible to reduce the manufacturing cost and maintenance cost.

1 is a schematic configuration diagram of a laser device according to an embodiment of the present invention;
2 is a schematic operation configuration diagram of a laser device according to the first embodiment of the present invention;
3 is a schematic operational configuration diagram of a laser device according to a second embodiment of the present invention.

Hereinafter, a laser apparatus according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. Prior to describing the laser device according to the embodiment of the present invention, it is found out that the laser device according to the embodiment of the present invention may be used as an Nd: YAG laser device or an Er: YAG laser device according to a required purpose. Put it.

1 is a schematic configuration diagram of a laser device according to an embodiment of the present invention.

As shown in FIG. 1, the laser device 1 according to an exemplary embodiment of the present invention includes a pump chamber 10, an output unit 20, a first light generator 30, and a second light generator 40. ), A shutter 50, a nonlinear crystal 60, a first beam splitter 70, and a second beam splitter 80. The laser device 1 according to an embodiment of the present invention aims to output light of at least two wavelength bands by using one pump chamber 10.

The pump chamber 10 emits and amplifies a laser wavelength after absorbing excitation light generated by receiving power from an external power supply (not shown). The pump chamber 10 includes a flash lamp and an Nd: YAG rod. Here, the pump chamber 10 composed of the flash lamp of the present invention and Nd: YAG is only an embodiment, the flash lamp is a laser diode LD, and Nd: YAG may be replaced according to a design change such as Er: YAG. It may be. That is, the pump chamber 10 is a laser medium having a wavelength oscillated in the region around 1064nm to 1340nm. The flash lamp receives power from the power supply and emits light. The Nd: YAG load amplifies and oscillates the excitation light input from the flash lamp.

The output unit 20 is provided at one side of the pump chamber 10 to reflect and output light output from the pump chamber 10. The output unit 20 forms an optical path in which light is mutually reflected with the first mirror unit 32 of the first light generator 30 to be described later, and outputs light amplified between the first mirror unit 32 and the first mirror unit 32. Output In addition, the output unit 20 forms an optical path through which light is reflected from the second mirror unit 42 of the second light generator 40, which will be described later, and is amplified between the second mirror unit 42 and the second mirror unit 42. Output light. Here, the output unit 20 includes light of the first wavelength generated by the first light generator 30 (see FIG. 2) and second light generated by the second light generator 40 which will be described later. It has a reflectance which can oscillate (B: see FIG. 3).

Next, the first light generating unit 30 and the second light generating unit 40 are disposed so that mutual positions can be replaced with respect to the output unit 20. For example, the first light generator 30 may be disposed on the same axis as the output unit 20, and may be disposed in the horizontal direction on the same axis of the first light generator 30 and the output unit 20. On the contrary, the positions of the first light generator 30 and the second light generator 40 may be replaced. Hereinafter, the first light generator 30 is disposed on the same axis as the output unit 20, and the second light generator 40 is the same axis between the first light generator 30 and the output unit 20. It is described as being disposed in the transverse direction with respect to the image. However, as described above, the first light generating unit 30 and the second light generating unit 40 may be changed in design such that their positions are replaced with each other.

The first light generator 30 is disposed to face the output unit 20 with the pump chamber 10 therebetween. The first light generator 30 generates light having a wavelength of 1064 nm as an embodiment of the present invention. However, the first light generator 30 may generate light having various wavelength bands in addition to light having a wavelength of 1064 nm according to a design change. The first light generation unit 30 includes a first mirror unit 32 and a first Q-switching unit 34.

The first mirror portion 32 is disposed on the same axis as the output portion 20 and reflects light with the output portion 20. That is, the first mirror part 32 forms an optical path through which light is reflected from the output part 20. The first mirror part 32 includes the light A having the first wavelength so that the light A having the first wavelength generated by the first light generator 30 forms the optical path with the output unit 20. Should be total reflection. On the other hand, the first mirror portion 32 preferably transmits the light B of the second wavelength generated by the second light generator 40.

The first Q-switching part 34 is provided to generate light A having a first wavelength. Here, the first Q-switching unit 34 is used as an Electric Optic (EO) Q-switching method as an embodiment of the present invention, in addition to the EO Q-switching method, Acoustic-Optic (AO) Q-switching method or Passive Q-switching can be used.

The first Q-switching part 34 may include a polarizer, a quarter-wave phase delayer, and a Pokels cell. The first Q-switching part 34 of the first embodiment of the present invention switches the light so that the light A of the first wavelength can be generated at a wavelength of 1064 nm. However, the first Q-switching unit 34 may switch the light A of the first wavelength into various wavelength bands according to design changes and purposes, in addition to the 1064 nm wavelength.

Meanwhile, the second light generator 40 is provided with the pump chamber 10 interposed with respect to the output unit 20. In one embodiment of the present invention, the second light generator 40 generates light B having a second wavelength having a wavelength of 1319 nm or 1338 nm. Here, in order to generate the light B having the second wavelength of 1319 nm or 1338 nm in the second light generator 40, the reflectance or output of the first mirror 32 of the second light generator 40 to be described later will be described. The reflectance of (20) should be adjusted. Of course, the second light generating unit 40, like the first light generating unit 30, generates light of various wavelength bands in addition to the second wavelength light B having a wavelength of 1319 nm or 1338 nm according to the design change and the purpose. can do. The second light generator 40 of the present invention includes a second mirror portion 42 and a second Q-switching portion 44.

The second mirror portion 42 is disposed in the horizontal direction of the light path formed by the output portion 20 and the first mirror portion 32 of the first light generation portion 30. The second mirror portion 42 forms an optical path with the output portion 20. Here, a first beam splitter 70 is disposed between the second mirror portion 42 and the output portion 20 to guide the light to form an optical path between the second mirror portion 42 and the output portion. The first beam splitter 70 will be described in detail below.

The second mirror 42 has a second wavelength of light B such that the second wavelength of light B generated by the second light generator 40 forms an optical path with the output 20. Should be total reflection. In addition, the second mirror portion 42 must adjust the reflectance so that light B of the second wavelength having a wavelength of 1319 nm or 1338 nm can be selectively oscillated. For example, in order to reflect the light B of the second wavelength having the wavelength of 1338 nm, the second mirror portion 42 must lower the reflectance by 3% or more than the light B of the second wavelength having the wavelength of 1319 nm. do. On the contrary, in order to reflect the light B of the second wavelength having the wavelength of 1319 nm, the second mirror portion 42 must lower the reflectance by 3% or more than the light B of the second wavelength having the wavelength of 1338 nm. Of course, the reflectance of the output unit 20 may be adjusted to selectively oscillate the light B having a wavelength of 1319 nm or 1338 nm.

The second Q-switching part 44 is provided so that the light B of the second wavelength can be generated. Here, the second Q-switching unit 44 is used in that manner according to the method selected by the first light generating unit 30 as an embodiment of the present invention. For example, the second light generator 40 is applied in the same manner when the first light generator 30 is used in the Electric Optic (EO) Q-switching scheme, and the first light generator 30 is applied to the EO. In addition to the Q-switching method, when the Acoustic-Optic (AO) Q-switching method or the passive Q-switching method is used, the same method as that of the first light generator 30 is applied.

The second Q-switching portion 44, like the first Q-switching portion 34, has a general configuration of a polarizer, a quarter-wave phase delayer and a Pokels cell. It can be configured as. The second Q-switching part of the embodiment switches the light so that the light B of the second wavelength can be generated at a wavelength of 1319 nm or 1338 nm. However, the second Q-switching unit 44 may switch the light B of the second wavelength to various wavelength bands according to design changes and purposes in addition to the wavelength of 1319 nm or 1338 nm.

Meanwhile, as described above, the first light generation unit 30 generates light A having a wavelength of 1064 nm and the second light generation unit has light of a second wavelength having a wavelength of 1319 nm or 1338 nm. Although it is described to generate B), the first light generator 30 may generate light having a wavelength of 1319 nm or 1338 nm, and the second light generator 40 may generate light having a wavelength of 1064 nm. . In this case, the first light to be described later according to the substitution of the first light generator 30 and the second light generator 40 or the wavelength band generated by the first light generator 30 and the second light generator 40. Performing the role of the beam splitter 70 may be different.

The shutter 50 is an optical path of any one of an optical path formed by the first light generator 30 and the output unit 20 or an optical path formed by the second light generator 40 and the output unit 20. Is placed on. The shutter 50 selectively blocks any one of the first wavelength light A and the second wavelength light B generated by the first light generator 30 and the second light generator 40. . The shutter 50 may block and open the optical path by a known motor or the like.

For example, as an exemplary embodiment of the present invention, the shutter 50 is disposed between the first light generator 30 and the output unit 20 to generate light of the first wavelength generated from the first light generator 30. Block (A). Of course, when the shutter 50 blocks the light A of the first wavelength, an optical path is formed between the second light generator 40 and the output unit 20. The shutter 50 opens between the first light generator 30 and the output unit 20 so as to form an optical path through which the light A of the first wavelength is generated. At this time, it is preferable that the light A of the first wavelength is transmitted by the second mirror portion 42. On the contrary, unlike the exemplary embodiment of the present invention, when the shutter 50 is disposed between the second light generator 40 and the output unit 20, the light B having the second wavelength is opened by opening the shutter 50. Is generated, the light B of the second wavelength incident on the first mirror portion 32 is preferably transmitted.

Next, the nonlinear determination unit 60 is disposed to face the pump chamber 10 with the output unit 20 interposed therebetween. The nonlinear decision unit 60 converts and transmits one wavelength band and the other wavelength band of the light A having the first wavelength and the light B having the second wavelength incident through the output unit 20. For example, the nonlinear crystal part 60 transmits the light A having a first wavelength of 1064 nm and the light B having a second wavelength of 1319 nm or 1338 nm to convert the wavelength band. To print. Here, the nonlinear crystal unit 60 converts the wavelength band into light of 1/2 wavelength of the incident light. For example, as an embodiment of the present invention, the nonlinear crystal part 60 converts the incident light B having light having a wavelength of 660 nm or 670 nm, which is 1/2 wavelength light (B / 2). The wavelength is converted and output.

The nonlinear crystal part 60 includes any one of KTP (KTiOP 4 ) and LBO (LiB 3 O 3 ). The material used as the nonlinear crystal part 60 is only an embodiment, and various nonlinear crystal parts 60 such as LINbO3 or KDP may be used in addition to KTP (KTiOP 4 ) and LBO (LiB 3 O 3 ). . The nonlinear crystal part 60 of the present invention should convert the wavelength band of 1319 nm or 1338 nm of the light B of the second wavelength into 1/2 wavelength (1 / 2B). In this case, the nonlinear crystal part 60 uses a crystal having a phase matching angle according to the wavelength of the light B having the incident second wavelength.

For example, when the temperature is 40 degrees, the phase matching angle of the nonlinear crystal part 60 used as KTP (KTiOP 4 ) is the principal plane XZ: theta = 59.1 degrees and phi = when light having a wavelength of 1338 nm is incident. It is preferred that 0 degrees and the main plane YZ: theta = 49.8 degrees and phi = 90 degrees. Here, it is noted that the main plane is a crystal plane of the direction in which light travels. On the other hand, the phase matching angle of the nonlinear crystal part 60 used as KTP (KTiOP 4 ) is the main plane XZ: theta = 59.9 degrees and phi = 0 degrees, and the main plane YZ: when light having a wavelength of 1319 nm is incident. It is preferred that theta = 50.6 degrees and phi = 90 degrees.

On the other hand, when the temperature is 40 degrees, the phase matching angle of the nonlinear crystal part 60 used as LBO (LiB 3 O 3 ) is the main plane XZ: theta = 85.1 degrees and phi = when light having a wavelength of 1338 nm is incident. It is preferred that 0 degrees and the main plane YZ: theta = 1.5 degrees and phi = 90 degrees. The phase matching angle of the nonlinear crystal part 60 used as LBO (LiB 3 O 3 ) is preferably main plane XZ: theta = 1.6 degrees and phi = 0 degrees when light having a wavelength of 1319 nm is incident.

Finally, the first beam separator 70 and the second beam separator 80 are respectively disposed with the pump chamber 10, the output unit 20, and the nonlinear crystal unit 60 interposed therebetween. The first beam splitter 70 is opposed to the output unit 20 with the pump chamber 10 interposed therebetween and disposed at an optical path intersection point of the first light generator 30 and the second light generator 40. . The first beam splitter 70 transmits light generated from one of the first light generator 30 and the second light generator 40 disposed at a position opposite to the output unit 20, and passes from the other. The generated light is reflected to the output unit 20. In detail, the first beam splitter 70 transmits light generated from any one of the first light generator 30 and the second light generator 40 disposed on the same axis as the output unit 20. Then, the light generated from the other one arranged in the horizontal direction with respect to the same axis is reflected to the output unit 20. In one embodiment of the present invention, the first beam splitter 70 transmits the light A having the first wavelength generated from the first light generator 30 disposed on the same axis as the output unit 20. The light B of the second wavelength generated from the second light generator 40 disposed in the horizontal direction on the same axis of the output unit 20 and the first light generator 30 is output unit 20. To reflect.

The second beam splitter 80 is disposed to face the first beam splitter 70 with the nonlinear crystal part 60 therebetween. The second beam splitter 80 transmits the first beam splitter 70 and is reflected by the first beam splitter 70 to transmit the light that has been transmitted and wavelength-converted through the nonlinear crystal part 60. In one embodiment of the present invention, the second beam splitter 80 transmits the light A having the first wavelength transmitted through the nonlinear crystal part 60 and is ½ wavelength (1) by the nonlinear crystal part 60. / 2B) is transmitted through the light.

On the other hand, the second beam splitter 80 is transmitted through the nonlinear crystal part 60 to transmit the light having the wavelength band converted, and the light transmitted through the nonlinear crystal part 60 to be transmitted is totally reflected. . That is, to be described in detail, the wavelength-converted light through the nonlinear crystal part 60 to 1/2 wavelength (1 / 2B) is transmitted, and the light B of the second wavelength transmitted through the non-linear crystal part is transmitted through total reflection. .

2 is a schematic operational configuration diagram of a laser device according to a first embodiment of the present invention, Figure 3 is a schematic operational configuration diagram of a laser device according to a second embodiment of the present invention.

The operation of the laser device according to the embodiment of the present invention by such a configuration will be described in detail below with reference to FIGS. 2 and 3.

As shown in FIG. 2, power is applied to the pump chamber 10 so as to oscillate the light A having the first wavelength. Then, the shutter 50 which cuts off the optical path between the output unit 20 and the first light generator 30 is operated to open the optical path.

The light having a wavelength of 1064 nm, which is the light A having the first wavelength generated by the first light generating unit 30, is amplified between the first mirror unit 32 and the output unit 20 to output the unit 20. Is output via Here, the first beam splitter 70 transmits the light A having the first wavelength, and the light A having the first wavelength which may be incident to the second light generator 40 is the second mirror part 42. Through).

The light A of the first wavelength output through the output unit 20 is incident on the nonlinear crystal unit 60 and transmitted. The light A having the first wavelength transmitted through the nonlinear crystal part 60 passes through the second beam separator 80 and finally oscillates.

Meanwhile, as shown in FIG. 3, light B having a second wavelength different from light A having a first wavelength is generated to produce 1/2 wavelength (1 / 2B) of light B having a second wavelength. Apply power to the pump chamber 10 so as to oscillate light. The second light generator 40 generates light B having a wavelength of 1318 nm or 1338 nm, and the light B having a second wavelength is output by the first beam splitter 70. 20) and the second mirror portion 42 are mutually reflected.

The light B of the second wavelength amplified between the second mirror portion 42 and the output portion 20 is output through the output portion 20 and is incident on the nonlinear crystal portion 60. The light incident on the nonlinear crystal part 60 is converted into a 1/2 wavelength band relative to the incident wavelength by the phase matching angle of the nonlinear crystal part 60. That is, as an embodiment of the present invention, the light B of the second wavelength having the wavelength of 1319 nm or 1338 nm is the light of the second wavelength B having the wavelength of red 660 nm or 670 nm through the nonlinear crystal part 60. Is output as light of 1/2 wavelength (1 / 2B) with respect to Light having a half wavelength (1 / 2B) with respect to the light B of the second wavelength output through the nonlinear crystal part 60 is oscillated through the second beam separator 80. At this time, the light B of the second wavelength transmitted through the nonlinear crystal part 60 is totally reflected by the second beam separator 80.

Therefore, since a laser having two wavelengths or more can be output by using a single pump chamber, a shutter, and a nonlinear crystal part, usability can be increased.

In addition, by simplifying the structure of the laser having two or more wavelengths by using a single pump chamber, a shutter, and a nonlinear crystal part, manufacturing cost and maintenance cost can be reduced.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, . Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

1: laser device 10: pump chamber
20: output unit 30: first light generating unit
32: first mirror portion 32: first Q-switching portion
40: second light generating unit 42: second mirror unit
44: second Q-switching portion 50: shutter
60: nonlinear crystal part 70: first beam separator
80: second beam separator

Claims (10)

A laser device having a pump chamber and an output unit provided at one side of the pump chamber to reflect and output light.
A first light generation unit disposed opposite the pump chamber with the pump chamber interposed therebetween to switch light reflected from the output unit and light to generate light having a first wavelength;
A second, different from the first wavelength of light generated from the first light generating unit, disposed in a horizontal direction with respect to the optical axis reflected between the output unit and the first light generating unit with the pump chamber therebetween; A second light generating unit for generating light having a wavelength;
It is disposed opposite the pump chamber with the output unit interposed therebetween, and transmits and transmits one of the light of the first wavelength and the light of the second wavelength and the other wavelength band which is output through the output and is incident. Laser device comprising a non-linear crystal portion to. The method of claim 1,
The first light generating unit includes a first mirror unit that reflects light to the output unit and a first Q-switching unit to switch the light between the output unit and the first mirror unit to light of the first wavelength. and,
The second light generating unit includes a second mirror unit for mutually reflecting the output unit and light, and a second Q-switching unit for switching the light between the output unit and the second mirror unit to light having the second wavelength. Laser device, characterized in that. 3. The method according to claim 1 or 2,
And the first light generating unit and the second light generating unit are disposed interchangeably with respect to the output unit. The method of claim 3,
The laser device,
The first light generation unit opposite the output unit with the pump chamber therebetween and disposed at an optical path intersection of the first light generation unit and the second light generation unit and disposed at a position opposite to the output unit; And a first beam splitter configured to transmit light generated from one of the second light generators and reflect light generated from the other;
A second beam disposed opposite the first beam splitter with the nonlinear crystal part interposed therebetween, and transmitting the first beam splitter and being reflected by the first beam splitter to transmit and transmit the wavelength-converted light through the nonlinear crystal part; And a beam splitter. 5. The method of claim 4,
And the second beam splitter outputs through the nonlinear crystal part to transmit the light having the wavelength band converted, and totally reflects the light incident and transmitted through the nonlinear crystal part so that the wavelength band is converted. 3. The method according to claim 1 or 2,
The laser device,
A shutter disposed on an optical path of any one of an optical path of the first light generator and an optical path of the second light generator to selectively block one of the light of the first wavelength and the light of the second wavelength; Laser device further comprising. 3. The method according to claim 1 or 2,
The nonlinear crystal part laser device, characterized in that it comprises any one of KTP (KTiOP 4 ) and LBO (LiB 3 O 3 ). 3. The method according to claim 1 or 2,
And the nonlinear crystal part converts any one of the light of the first wavelength and the light of the second wavelength into 1/2 wavelength band of the incident wavelength and outputs the converted wavelength. 9. The method of claim 8,
Any one of the light of the first wavelength and the light of the second wavelength is a wavelength of 1064nm, the other is a laser device of 1319nm or 1338nm wavelength. 10. The method of claim 9,
The light incident on the nonlinear crystal part has a wavelength of 1319 nm or 1338 nm, and the wavelength band of the light converted by the nonlinear crystal part has a wavelength of 660 nm or 670 nm.
KR1020120031599A 2012-03-28 2012-03-28 Laser apparatus KR20130109664A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016148529A1 (en) * 2015-03-17 2016-09-22 (주)루트로닉 Laser apparatus
WO2020231155A1 (en) * 2019-05-14 2020-11-19 주식회사 루트로닉 Device and method for generating laser pulse
WO2022238828A1 (en) * 2021-05-10 2022-11-17 Alcon Inc. Laser pulse selection using motorized shutter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016148529A1 (en) * 2015-03-17 2016-09-22 (주)루트로닉 Laser apparatus
WO2020231155A1 (en) * 2019-05-14 2020-11-19 주식회사 루트로닉 Device and method for generating laser pulse
KR20200131666A (en) * 2019-05-14 2020-11-24 주식회사 루트로닉 Device and method of generating laser pulse
WO2022238828A1 (en) * 2021-05-10 2022-11-17 Alcon Inc. Laser pulse selection using motorized shutter

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