CN103794976A - Laser with Fabry-Perot band-pass filter serving as laser resonant cavity output mirror - Google Patents
Laser with Fabry-Perot band-pass filter serving as laser resonant cavity output mirror Download PDFInfo
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- CN103794976A CN103794976A CN201410063226.6A CN201410063226A CN103794976A CN 103794976 A CN103794976 A CN 103794976A CN 201410063226 A CN201410063226 A CN 201410063226A CN 103794976 A CN103794976 A CN 103794976A
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Abstract
The invention relates to a laser, in particular to the laser with a Fabry-Perot band-pass filter serving as a laser resonant cavity output mirror. The laser is provided with a pump light source, a laser cavity input mirror, a laser crystal and the laser cavity output mirror which are in light connection with each other in sequence. The Fabry-Perot band-pass filter serves as the laser cavity output mirror, a film is plated on the connection end face of the laser cavity input mirror and the laser crystal to enable the pump light to be transmitted and the laser to be reflected highly, the laser cavity input mirror and the Fabry-Perot band-pass filter form two reflective mirrors of a laser resonant cavity, and all the optical elements are positioned on the same axis. By means of the design of a film system, the inhibited wavelength is positioned in a pass band of the Fabry-Perot band-pass filter in order to increases loss of the inhibited wavelength, the wavelength hoping to be output is positioned at the edge of the pass band or out of the pass band of the filter to obtain a certain transmittance, and therefore, needed wavelength and power output can be obtained.
Description
Technical field
The present invention relates to laser, especially relate to the laser of Fabry-Perot band pass filter as laserresonator outgoing mirror.
Background technology
Gain medium generally has multiple emission wavelengths, in order to obtain the Laser output of certain wavelength, conventionally adopts the method for plating special film system on outgoing mirror, suppresses the vibration of other wavelength.When repressed wavelength with while wishing the wavelength apart from each other of output, this method is [Y.F.Chen, Appl.Phys.B70,475 – 478 (2000)] relatively effectively; When the two is when nearer, this method designs and is coated with film system and proposed very high requirement [Y.F.Chen, M.L.Ku, and K.W.Su, Opt.Lett.30,2107-2109 (2005)]; In the time that both approach very much, the method is by no longer valid, then the method [G.Shayeganrad, Y.C.Huang, L.Mashhadi, Appl Phys B108,67 – 72 (2012)] of placing certain angle Fabry-Perot etalon in employing chamber.
Summary of the invention
The object of the present invention is to provide the laser of a kind of Fabry-Perot band pass filter as laserresonator outgoing mirror.
The present invention is provided with pump light source, laser cavity input mirror, laser crystal and laser cavity outgoing mirror; Described pump light source, laser cavity input mirror, laser crystal are connected with laser cavity outgoing mirror successively light, laser cavity outgoing mirror adopts Fabry-Perot band pass filter, the connecting end surface of laser cavity input mirror and laser crystal is coated with film, to pump light transmission, high anti-to laser, described laser cavity input mirror and Fabry-Perot band pass filter form two speculums of laser resonant cavity, and all optical elements are positioned on same axis.
Between described pump light source and laser cavity input mirror, can be provided with focusing arrangement.
Described laser cavity outgoing mirror can be established 2.
The present invention is based on the laser of Fabry-Perot band pass filter as laser cavity outgoing mirror, by passband position and the transmitance of design method Fabry-Perot-type band pass filter, allow and wish that middle part that repressed wavelength is positioned at passband is to increase its loss, allow the wavelength of wishing output be positioned at outside the edge of passband or passband to reduce its loss, thereby obtain the wavelength output of expecting.
The present invention is by passband position and the transmitance of design method Fabry-Perot-type band pass filter, allow the diverse location of the different wavelength position of two radiation intensity in filter passband, allow middle part that the high wavelength of radiation intensity approaches passband to increase its loss, allow the low wavelength of radiation intensity be positioned at outside the edge of passband or passband to reduce its loss, thereby obtain dual-wavelength laser output.
The present invention adopts two Fabry-Perot band pass filters that passband position is different, first filter is as the resonator mirror of first wavelength, the radiation (making second wavelength be positioned at or approach the center of first filter passband) that sees through second wavelength as much as possible in realizing first wavelength laser vibration; Second filter is as the resonator mirror of second wavelength, the radiation (making first wavelength be positioned at or approach the center of second filter passband) that sees through first wavelength as much as possible in realizing the vibration of second wavelength laser, can realize the Laser output of dual wavelength or multi-wavelength.
Laser between described focusing arrangement and laser crystal input mirror can be had film identical function, that be plated in laser crystal input system to substitute.
Described optical element end face can plate corresponding film to increase transmission or reflection.
The present invention adopts Fabry-Perot band pass filter as laser output mirror, be that design allows passband that repressed wavelength is in fabry-perot filter to increase its loss by film, allow the wavelength of wishing output be in outside the passband edge of filter or passband and obtain certain transmitance simultaneously, thereby obtain the wavelength and the power stage that need.Fabry-Perot band pass filter is ripe designing technique, not only easily make, and passband can do very narrowly, go for suppressed wavelength and wish the situation that output wavelength interval is very little, it will have potential very important using value as laser output mirror.This resonant cavity utilizes the passband of Fabry-Perot band pass filter to suppress the vibration of certain wavelength, thereby obtains the Laser output of another one wavelength, is highly suitable for suppressed wavelength and desired output wavelength at a distance of nearer situation.
Accompanying drawing explanation
Fig. 1 be the embodiment of the present invention 1 adopt a cutting Nd:YVO4 as laser crystal, adopt the light path schematic diagram of a Fabry-Perot band pass filter as the laser of laser cavity outgoing mirror.
Fig. 2 be the embodiment of the present invention 2 adopt a cutting Nd:YVO4 as laser crystal, adopt the light path schematic diagram of two Fabry-Perot band pass filters as the laser of laser cavity outgoing mirror.
Embodiment
Following examples are further described of the present invention in connection with accompanying drawing.
Embodiment 1:
As shown in Figure 1, the embodiment of the present invention 1 is provided with a pump light source 11, focusing arrangement 12, laser cavity input mirror 13, laser crystal 14 and a Fabry-Perot band pass filter 15.
It is that the laser of 808 nanometers is as pump light that pump light source 11 first-selections can be sent wavelength.Focus lens unit 12 can have multiple implementation, its function be light that pumping source 11 is sent collection, shaping, converge, the pump light of transmission in laser crystal 14 is mated with the zlasing mode of vibrating in laser cavity.The face that laser cavity input mirror 13 approaches focusing arrangement 12 is coated with the anti-reflection film to pump light, the face that approaches laser crystal 14 be coated with anti-reflection to pump light, to 1064 nanometers and the high anti-film of 1085 nanometer lasers system.The end face plating that also can approach focusing arrangement 12 at laser crystal 14 to pump light anti-reflection, to 1064 nanometers and the high anti-film of 1085 nanometer light, as a speculum of laser resonant cavity, so just can omit laser cavity and input mirror 13.Laser crystal 14 can adopt the Nd:YVO4 of a cutting, and this crystal has two stronger emission peaks near 1064 nanometers, respectively near 1064 nanometers and 1085 nanometers.Conventionally, the emissive porwer of 1064 nanometers is high, and it can suppress the vibration of 1085 nanometer lasers after obtaining and vibrating.Can design the Fabry-Perot band pass filter 15 as laser cavity outgoing mirror, make 1064 nanometers be positioned at its passband center, 1085 nanometers are positioned at outside its passband edge or passband.Like this, the light of 1064 nanometers is because transmitance is high, and loss is too large, and formation Laser output can not vibrate; The light of 1085 nanometers is because transmitance is low, and loss is little, and easily vibration forms Laser output; Produce vibration thereby effectively suppressed 1064 stronger nanometers of stimulated emission, obtained the Laser output of 1085 weak nanometers of stimulated emission.
In embodiment 1, can design the Fabry-Perot band pass filter 15 as laser cavity outgoing mirror, make the light of 1064 nanometers and 1085 nanometers be positioned at the diverse location of its passband, make the center of the more close passband of 1064 nanometer, make outside the edge or passband of the more close passband of 1085 nanometer, thereby make the two obtain different losses.When select when appropriate, can vibrate in the position of two wavelength simultaneously, thereby obtain dual-wavelength laser output.
Embodiment 2:
Fig. 2 be adopt a cutting Nd:YVO4 as laser crystal, adopt the light path schematic diagram of two Fabry-Perot band pass filters as the laser of laser cavity outgoing mirror.
As shown in Figure 2, embodiment 2 is provided with a pump light source 21, focusing arrangement 22, laser cavity input mirror 23, laser crystal 24, first method Fabry-Perot-type band pass filter 25, the second Fabry-Perot band pass filter 26.
In embodiment 2, pump light source 21, focusing arrangement 22, laser cavity input mirror 23, laser crystal 24, first method Fabry-Perot-type band pass filter 25 is identical with the description of corresponding device in embodiment 1.Different places is to have increased by the second Fabry-Perot band pass filter 26, and its bandpass characteristics is different from first method Fabry-Perot-type band pass filter 25.The design of the second Fabry-Perot band pass filter 26, makes 1085 nanometers be positioned at its passband center, and 1064 nanometers are positioned at outside its passband edge or passband.The laser of 1085 nanometers that like this, first method Fabry-Perot-type band pass filter 25 produces can maximum possible see through the second Fabry-Perot band pass filter 26; See through the excited radiation light of 1064 nanometers at first method Fabry-Perot-type band pass filter 25 passband centers arriving when the second Fabry-Perot band pass filter 26, because transmitance is low, loss is little, and easily vibration forms Laser output; Thereby obtain the Laser output of 1064 nanometers and 1085 nano double wavelength.In the present embodiment, first method Fabry-Perot-type band pass filter 25 and the second Fabry-Perot band pass filter 26 be respectively as second outgoing mirror of the laserresonator of 1085 nanometers and 1064 nanometer light, thereby realized dual-wavelength laser output.
Claims (4)
1. Fabry-Perot band pass filter, as the laser of laserresonator outgoing mirror, is characterized in that being provided with pump light source, laser cavity input mirror, laser crystal and laser cavity outgoing mirror; Described pump light source, laser cavity input mirror, laser crystal are connected with laser cavity outgoing mirror successively light, laser cavity outgoing mirror adopts Fabry-Perot band pass filter, the connecting end surface of laser cavity input mirror and laser crystal is coated with film, to pump light transmission, high anti-to laser, described laser cavity input mirror and Fabry-Perot band pass filter form two speculums of laser resonant cavity, and all optical elements are positioned on same axis.
2. Fabry-Perot band pass filter, as the laser of laserresonator outgoing mirror, is characterized in that being provided with focusing arrangement between described pump light source and laser cavity input mirror as claimed in claim 1.
3. Fabry-Perot band pass filter, as the laser of laserresonator outgoing mirror, is characterized in that described laser cavity outgoing mirror establishes 2 as claimed in claim 1.
4. Fabry-Perot band pass filter, as the laser of laserresonator outgoing mirror, is characterized in that described optical element end face plating film as claimed in claim 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410063226.6A CN103794976A (en) | 2014-02-25 | 2014-02-25 | Laser with Fabry-Perot band-pass filter serving as laser resonant cavity output mirror |
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| CN201410063226.6A CN103794976A (en) | 2014-02-25 | 2014-02-25 | Laser with Fabry-Perot band-pass filter serving as laser resonant cavity output mirror |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124608A (en) * | 2014-08-01 | 2014-10-29 | 厦门大学 | Blu-ray-pumped praseodymium-doped yttrium lithium fluoride all-solid-state 670nm red laser |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060215713A1 (en) * | 2005-03-28 | 2006-09-28 | Axsun Technologies, Inc. | Laser with tilted multi spatial mode resonator tuning element |
| CN101546086A (en) * | 2009-04-23 | 2009-09-30 | 贵州大学 | Fabry-Perot cavity structure all-optical cache based on high-nonlinearity optical fiber |
-
2014
- 2014-02-25 CN CN201410063226.6A patent/CN103794976A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060215713A1 (en) * | 2005-03-28 | 2006-09-28 | Axsun Technologies, Inc. | Laser with tilted multi spatial mode resonator tuning element |
| CN101546086A (en) * | 2009-04-23 | 2009-09-30 | 贵州大学 | Fabry-Perot cavity structure all-optical cache based on high-nonlinearity optical fiber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124608A (en) * | 2014-08-01 | 2014-10-29 | 厦门大学 | Blu-ray-pumped praseodymium-doped yttrium lithium fluoride all-solid-state 670nm red laser |
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