CN106898941B - Polarised light multi-pass amplifier based on splicing crystal - Google Patents
Polarised light multi-pass amplifier based on splicing crystal Download PDFInfo
- Publication number
- CN106898941B CN106898941B CN201710151448.7A CN201710151448A CN106898941B CN 106898941 B CN106898941 B CN 106898941B CN 201710151448 A CN201710151448 A CN 201710151448A CN 106898941 B CN106898941 B CN 106898941B
- Authority
- CN
- China
- Prior art keywords
- crystal
- reflective mirror
- total reflective
- splicing
- light beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000013078 crystal Substances 0.000 title claims abstract description 109
- 238000010304 firing Methods 0.000 claims 1
- 230000010287 polarization Effects 0.000 abstract description 39
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 24
- 230000003321 amplification Effects 0.000 abstract description 23
- 230000003287 optical effect Effects 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 6
- 238000005086 pumping Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000011514 reflex Effects 0.000 description 10
- 239000000126 substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000003447 ipsilateral effect Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- 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
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/39—Non-linear optics for parametric generation or amplification of light, infrared or ultraviolet waves
-
- 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
- H01S3/10061—Polarization control
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
Abstract
A kind of polarised light multi-pass amplifier based on splicing crystal is made of polarizing film, Faraday rotator, the first total reflective mirror, the second total reflective mirror, third total reflective mirror, the 4th total reflective mirror, splicing crystal, the 5th total reflective mirror, the one 1/2 wave plate, the 2nd 1/2 wave plate.The light beam of multi-pass amplifier of the present invention light beam polarization angle in transmission and amplification process is 45 °, therefore splicing crystal is that the crystal for the use of C axis being 45 ° is spliced, and utilize the difference of linearly polarized light polarization state, realize that traditional four-way amplifies using two logical enlarged structures, reduce incident angle α when seed light beam entrance crystal, area of the final seam for reducing splicing crystal on spot projection face, improves amplification efficiency.Two 1/2 wave plates are all placed in pumping optical path, on the state of seed light beam without influence, so that save the cost, ensure that the reliability of amplifier.
Description
Technical field
The present invention relates to laser amplifier, especially a kind of polarised light multi-pass amplifier based on splicing crystal.
Background technique
Requirement of chirped pulse amplification (Chirped-Pulse-Amplification, the abbreviation CPA) system to energy is more next
Higher, so that crystal (Ti:Sapphire laser) bore becomes greatly, bigbore crystal growth cycles are long and expensive.Secondly, seed
When pulse is amplified through crystal, generated unwanted oscillation (Parasitic Lasing, abbreviation PL) dramatically disappears in crystal
The energy storage for having consumed crystal has seriously affected the optical quality and amplification efficiency of amplification output pulse, and with crystal bore
Increase, unwanted oscillation is more prone to produce.Crystal splicing can effectively inhibit the generation of unwanted oscillation, while can be formed
Bore biggish crystal, very good solution are the problems of above-mentioned.
In optical field, multi-pass amplifier, which refers to, turns back to light beam using total reflective mirror, and the light beam after turning back is not respectively with
Same angle is by same gain substance and carries out energy amplification, and the number generally turned back is less than 10 times.Currently, traditional multi-pass
Amplifier is all to be built (to can be generally divided into two kinds, one is by constantly expanding by gain substance and muti-piece total reflective mirror
Or reduce incident angle and realize multi-pass amplifier, it is another, when amplification medium is to light beam polarization state no requirement (NR), it can use rotation
The polarization state for turning light beam carries out multi-pass amplifier, and light beam is circular polarization state or partially leads to secondary to be circular polarization in amplification medium
State), and total reflective mirror number required for the process is more, between two total reflective mirrors (center) that the same side is used to turn back away from
From bigger, the angle [alpha] of incident gain substance is bigger.Assuming that the distance between two total reflective mirrors (center) are h, total reflective mirror to crystal
Distance be l, then have following relational expression,
When gain substance is splicing crystal, light beam is reflexed into splicing crystal with incidence angles degree using total reflective mirror,
Due to splicing the presence of crystal seam, area of the seam on emergent light spot perspective plane is caused to increase with the increase of incident angle
It greatly, as Figure 1-1, is traditional four-way amplifier structure in Fig. 1-1, in figure: 1 is a logical amplification, and 2 amplify for two-way, and 3 are
Three-pass amplifier, 4 amplify for four-way.Splicing crystal thickness in the multi-pass amplifier is 8mm, gaping of joints 3.5mm, by can in figure
To see a logical amplification light beam entrance crystal angle [alpha] for 5.46 °, after two-way is amplified, through three-pass amplifier light beam entrance crystal angle
Spending α is 9.05 °, is amplified by four-way；It can be seen that the distance between ipsilateral two total reflective mirrors (center) are bigger, light beam is incident brilliant
Body angle [alpha] is bigger.As shown in Figs. 1-2, figure (a) is after crystal is spliced in beam orthogonal incidence, and emergent light spot projection is schemed (b) and schemed
It (c) is respectively the logical emergent light spot projection with after three-pass amplifier of four-way amplifier one shown in Fig. 1-1.Due to the four-way amplifier position
In horizontal optical platform, therefore ten interword gap of emergent light spot horizontal direction is substantially unchanged, but when light beam is through a logical and threeway
When amplification, since the special construction that light beam incidence splicing crystal has the angle [alpha] that can not ignore and splices crystal itself (is not examined
Consider other human factors), it will cause logical ten interword gap of emergent light spot vertical direction with after three-pass amplifier to become respectively
4.87mm and 5.74mm, so big gap will cause the loss of amplified energy, influence subsequent optical path, be not easy to practical application.
Amplifier generallys use the amplification of s or p polarization state, and optical element is typically also to be designed according to polarization state, so putting
Big device, which goes out light, will return to s or p polarization state, be convenient for subsequent use.Seed light beam becomes 45 ° partially after passing through Faraday rotator
The linearly polarized light at vibration angle, therefore when seed light beam and pump beam are incident to simultaneously on splicing crystal, it is necessary to ensure that seed light beam
Polarization state, pump beam polarization state and splice the C axis of crystal and be consistent, i.e. the polarization shape of incident beam polarised light
State will be consistent with crystal C axis, if there are certain angles for polarization state and C axis, will generate spectral modulation (can refer to text
[1] Xiaoming Lu etc. is offered, " Birefringent plate design for broadband spectral shaping
in a Ti:sapphire regenerative amplifier").If crystal C axis is according to general amplifier application method, i.e. s
Or p polarization state, it needs to adjust to crystal demand seed light beam polarization state with wave plate and is consistent, and broadband waveplate is because of bandwidth
Wider, technique is more demanding, should not obtain the high-quality product of requirement.
Summary of the invention
In order to solve above-mentioned problem of the prior art, a kind of polarised light multi-pass amplifier based on splicing crystal is provided.It should
Amplifier utilizes the polarization state difference of linearly polarized light, and two logical enlarged structures realize traditional four-way amplification, reduce seed light beam and enter
Incident angle α when crystal is penetrated, area of the final seam for reducing splicing crystal on spot projection face improves amplification efficiency.Two
A 1/2 wave plate is all placed in pumping optical path, on the state of seed light beam without influence, so that save the cost, ensure that amplifier
Reliability.
It is as follows that the present invention solves technical solution:
1, a kind of polarised light multi-pass amplifier based on splicing crystal, it is characterized in that: by polarizing film, Faraday optically-active
Device, the first total reflective mirror, the second total reflective mirror, third total reflective mirror, the 4th total reflective mirror, splicing crystal, the 5th total reflective mirror, the one 1/2 wave
Piece, the 2nd 1/2 wave plate are constituted, and the splicing crystal is that the crystal for the use of C axis being 45 ° is spliced, and positional relationship is such as
Under: along seed light beam incident direction be successively the polarizing film, Faraday rotator, the first total reflective mirror, the second total reflective mirror,
Splice crystal, the 4th total reflective mirror, third total reflective mirror, splicing crystal and the 5th total reflective mirror, the polarizing film, the first total reflective mirror with
Beam direction is in 45 °, and the 5th total reflective mirror and beam direction are in 90 °, remaining total reflective mirror and beam direction adjustable angle, along the first pump
Pu light beam incident direction is successively the one 1/2 wave plate, splicing crystal, is successively institute along the second pump beam incident direction
The incident angle α of the 2nd 1/2 wave plate, the splicing crystal stated, the seed light beam incidence splicing crystal meets following relational expression:
In formula, D is emergent light spot diameter, and d is the thickness for splicing crystal, and d ' is the joint gap for splicing crystal, and n is splicing
The refractive index of crystal.
The present invention is based on the course of work of the polarised light multi-pass amplifier of splicing crystal is as follows:
Seed light beam is incident on polarizing film, become after polarizing film linearly polarized light (herein using for p-type polarizing film,
Therefore generate the p polarization state of direction of vibration and incident direction level), it is then incident to Faraday rotator, light beam polarization angle turns
Cross 45 °；Light beam reflexes to the second total reflective mirror through the first total reflective mirror, then reflexes to splicing crystal by the second total reflective mirror, logical through first
The 4th total reflective mirror is emitted to after amplification, light beam reflexes to third total reflective mirror through the 4th total reflective mirror, reflexes to by third total reflective mirror
Splice crystal, is emitted to the 5th total reflective mirror after the second logical amplification, light beam is incident to splicing crystal through the 5th total reflective mirror, through third
Logical amplification is emitted to third total reflective mirror, after successively reflex to splicing crystal through third total reflective mirror and the 4th total reflective mirror, through four-way
It is emitted to the second total reflective mirror after amplification, successively reflexes to Faraday rotator, emergent light through the second total reflective mirror and the first total reflective mirror
The beam angle of polarization turns over 45 ° (therefore light beam polarization angle corotation crosses 90 °, and light beam becomes s polarization state) in the same direction again, and light beam enters
It is incident upon polarizing film, since polarizing film only allows p light to pass through, therefore light beam (s light) reflects optical path by polarizing film.Wherein two beams pump
Light beam (linearly polarized light) respectively becomes the linearly polarized light that the angle of polarization is 45 ° through the one 1/2 wave plate and the 2nd 1/2 wave plate and is incident to spelling
Connect crystal.
Usually it is considered that area S ' and total emergent light spot area S of the seam of splicing crystal on emergent light spot perspective plane
Between there are when following relationship, light beam can continue to use, i.e.,
Assuming that emergent light spot diameter is D, emergent light spot cross vertical direction gap is a, and horizontal direction gap is a ', splicing
Crystal thickness is d, and the seam for splicing crystal is d ', crystal refractive index n, since emergent light spot cross horizontal direction gap is basic
It is unchanged, so a ' ≈ d ', therefore just like lower aprons relationship,
Therefore incident angle α need to meet following relationship,
It is as follows that the present invention solves the advantages of technology:
1. the present invention is based on the polarised light multi-pass amplifiers of splicing crystal can be realized traditional four-way amplification, same by reducing
The distance between side total reflective mirror (center) reduces the incident angle α of light beam incidence splicing crystal, and the final splicing seam that reduces is in hot spot
Area on perspective plane.
2. the present invention is based on the lines that light beam polarization state in the polarised light multi-pass amplifier of splicing crystal is 45 ° of angles of polarization
Polarised light ensure that the amplification efficiency of system, while will not generate spectrum tune due to the mismatch of crystal C axis and seed light polarization
System.
3. the present invention is based on 1/2 wave plate bandwidth being placed in pumping optical path in the polarised light multi-pass amplifier of splicing crystal
2 magnitudes smaller than seed light beam, are easily obtained, high reliablity.Simultaneously because 1/2 wave plate is not in seed optical path, seed light beam
Without 1/2 wave plate, on the state of seed light beam without influence, therefore to main optical path without directly affecting, guarantee the reliable of amplifier
Property.
Detailed description of the invention
Fig. 1-1 is incident angle disparity map
Fig. 1-2 is spot projection figure
Fig. 2 is that the present invention is based on the polarised light multi-pass amplifier structural schematic diagrams of splicing crystal
Fig. 3 is present invention splicing crystal (2x2) structural schematic diagram
Specific embodiment
First referring to Fig. 2, Fig. 2 is that the present invention is based on the polarised light multi-pass amplifier structural schematic diagrams of splicing crystal, in figure
Pump beam only uses two-way, it is also possible to multichannel, it is only for reference.As seen from the figure, the present invention is based on the polarised light multi-pass of splicing crystal
Amplifier is all-trans by polarizing film 1, Faraday rotator 2, the first total reflective mirror 3, the second total reflective mirror 4, third total reflective mirror the 5, the 4th
Mirror 6, splicing crystal 7, the 5th total reflective mirror 8, the one 1/2 wave plate 9, the 2nd 1/2 wave plate 10 are constituted, and the splicing crystal 7 is to make
It is what 45 ° of crystal was spliced with C axis, positional relationship is as follows: is successively described inclined along 11 incident direction of seed light beam
Shake piece 1, Faraday rotator 2, the first total reflective mirror 3, the second total reflective mirror 4, splicing crystal 7, the 4th total reflective mirror 6, third total reflective mirror
5, splice crystal 7 and the 5th total reflective mirror 8, the polarizing film 1, the first total reflective mirror 3 and beam direction are in 45 °, the 5th total reflective mirror 8
It is in 90 ° with beam direction, remaining total reflective mirror and beam direction adjustable angle, are successively institutes along 12 incident direction of the first pump beam
The one 1/2 wave plate 9 stated, splicing crystal 7, along 13 incident direction of the second pump beam be successively the 2nd 1/2 wave plate 10,
Splice crystal 7, the incident angle α of the incident splicing crystal 7 of the seed light beam 11 meets following relational expression:
In formula, D is emergent light spot diameter, and d is the thickness for splicing crystal, and d ' is the joint gap for splicing crystal, and n is splicing
The refractive index of crystal.
The present invention is based on the course of work of the polarised light multi-pass amplifier of splicing crystal is as follows:
Seed light beam is incident first, and the center of polarizing film 1, Faraday rotator 2 and the first total reflective mirror 3 need to be guaranteed same
On straight line, these three element centrals are placed on same straight line using the method that aperture collimates, and enable light beam
Pass through Faraday rotator 2 completely.Seed light beam 11 is incident on polarizing film 1, becomes linearly polarized light after polarizing film 1 (herein
For p-type polarizing film, therefore generate the p polarization state of direction of vibration and incident direction level), then it is incident to Faraday
Polarization apparatus 2, light beam polarization angle turn over 45 °；Light beam reflexes to the second total reflective mirror 4 through the first total reflective mirror 3, then by the second total reflective mirror 4
Splicing crystal 7 is reflexed to, is emitted to the 4th total reflective mirror 6 after the first logical amplification, it is complete that light beam through the 4th total reflective mirror 6 reflexes to third
Anti- mirror 5 reflexes to splicing crystal 7 by third total reflective mirror 5, is emitted to the 5th total reflective mirror 8 after the second logical amplification, and light beam is through the
Five total reflective mirrors 8 be incident to splicing crystal 7, be emitted to third total reflective mirror 5 through three-pass amplifier, after successively through 5 He of third total reflective mirror
4th total reflective mirror 6 reflexes to splicing crystal 7, the second total reflective mirror 4 is emitted to after four-way amplification, successively through the second total reflective mirror 4
Faraday rotator 2 is reflexed to the first total reflective mirror 3, the outgoing beam angle of polarization turns over 45 ° of (event light beams in the same direction again
Angle of polarization corotation crosses 90 °, and light beam becomes s polarization state), light beam is incident to polarizing film 1, since 1 permission p light of polarizing film is logical
It crosses, therefore light beam (s light) reflects optical path by polarizing film 1.Wherein two beam pump beams 12,13 (linearly polarized light) are respectively through the 1st
2 wave plates 9 and the 2nd 1/2 wave plate 10 will become the linearly polarized light that the angle of polarization is 45 ° and be incident to splicing crystal 7.Since the present invention is more
The seed light beam polarization state of logical amplifier is amplified using the linearly polarized light for being 45 ° of angles of polarization, therefore also to ensure pump beam
Polarization state is that the linearly polarized light incidence of 45 ° of angles of polarization increases splicing crystal 7；The polarization of pump beam is determined first with analyzer
Angle, and determine the angle theta between pump beam and seed light beam polarization state, then make the optical axis and pump beam of 1/2 wave plate
Linearly polarized light can guarantee when seed light beam and the pump beam incidence by 1/2 wave plate splice crystal 7 in this way at the angle of θ/2
Polarization state is consistent.
Using splicing crystal 7, the C axis direction of each piece of crystal need to be measured, crystal C axis is spliced by 45° angle, according to Fig. 3
Shown structure is placed.Splice crystal (2x2) structure, a left side is main view, and the right side is left view, and Fig. 3 is 4 pieces of splicing crystal structures
One block of rod-like crystal is divided into four pieces by (2x2), only for reference, and more muti-piece splicing crystal structure can also be used.
Experiment shows that the present invention is able to achieve traditional four-way enlarged structure, by reducing between ipsilateral total reflective mirror (center)
Distance reduces incident angle α when seed light beam incidence splicing crystal, for example, crystal thickness is 8mm, crystal splicing seam is
3.5mm, the distance of total reflective mirror to crystal are 1500mm, and the distance between two total reflective mirrors (center) are 200mm, and incident angle α is
3.8 °, meet the angle α needed for testing, finally reduces area of the seam of splicing crystal on spot projection face.Two 1/2 wave plates
It is placed in pumping optical path, neither influence seed light beam, and energy save the cost, ensure that the reliability of amplifier.
Claims (1)
1. a kind of polarised light multi-pass amplifier based on splicing crystal, it is characterised in that: by polarizing film (1), Faraday rotator
(2), the first total reflective mirror (3), the second total reflective mirror (4), third total reflective mirror (5), the 4th total reflective mirror (6), splicing crystal (7), the 5th
Total reflective mirror (8), the one 1/2 wave plate (9), the 2nd 1/2 wave plate (10) are constituted, and it is 45 ° that the splicing crystal (7), which is using C axis,
Crystal be spliced, positional relationship is as follows: along seed light beam (11) incident direction be successively the polarizing film (1),
Faraday rotator (2), the first total reflective mirror (3), the second total reflective mirror (4), splicing crystal (7), the 4th total reflective mirror (6), third are complete
Anti- mirror (5), splicing crystal (7) and the 5th total reflective mirror (8), the polarizing film (1), the first total reflective mirror (3) are in beam direction
45 °, the 5th total reflective mirror (8) and beam direction are in 90 °, remaining total reflective mirror and beam direction adjustable angle, along the first pump beam
(12) incident direction is successively the one 1/2 wave plate (9), splicing crystal (7), along the second pump beam (13) incident direction
It is successively the 2nd 1/2 wave plate (10), splicing crystal (7), incident splicing crystal (7) of the seed light beam (11) enters
Firing angle α meets following relational expression:
In formula, D is emergent light spot diameter, and d is the thickness for splicing crystal, and d ' is the joint gap for splicing crystal, and n is splicing crystal
Refractive index.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710151448.7A CN106898941B (en) | 2017-03-14 | 2017-03-14 | Polarised light multi-pass amplifier based on splicing crystal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710151448.7A CN106898941B (en) | 2017-03-14 | 2017-03-14 | Polarised light multi-pass amplifier based on splicing crystal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106898941A CN106898941A (en) | 2017-06-27 |
| CN106898941B true CN106898941B (en) | 2019-04-19 |
Family
ID=59192214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710151448.7A Active CN106898941B (en) | 2017-03-14 | 2017-03-14 | Polarised light multi-pass amplifier based on splicing crystal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106898941B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190492B (en) * | 2019-04-11 | 2021-04-13 | 北京盛镭科技有限公司 | Laser amplifier |
| CN111948871B (en) * | 2020-08-18 | 2022-01-28 | 中国工程物理研究院激光聚变研究中心 | Multi-pass amplification system shared by pump light and signal light |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1834765A (en) * | 2006-03-23 | 2006-09-20 | 北京工业大学 | Super-short laser pulse four-way amplifier |
| CN203150896U (en) * | 2012-12-29 | 2013-08-21 | 深圳大学 | Multi-channel amplification system of ultra-short pulse laser |
| US8995052B1 (en) * | 2013-09-09 | 2015-03-31 | Coherent Kaiserslautern GmbH | Multi-stage MOPA with first-pulse suppression |
| CN105552707B (en) * | 2016-01-29 | 2018-10-19 | 中国科学院上海光学精密机械研究所 | Multi-pass amplifier device of turning back based on laser crystal splicing |
-
2017
- 2017-03-14 CN CN201710151448.7A patent/CN106898941B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106898941A (en) | 2017-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7154659B1 (en) | Optical depolarizers and DGD generators based on optical delay | |
| CN202383362U (en) | Polarization rotation device and laser polarization beam combiner system | |
| CN102004326B (en) | Depolarization delay device | |
| US11698493B2 (en) | Single-ended output circulator | |
| EP3667839B1 (en) | Optical module and erbium-doped fiber amplifier | |
| CN106898941B (en) | Polarised light multi-pass amplifier based on splicing crystal | |
| CN103869505A (en) | Large-aperture polarization independent high-power isolator | |
| CN107908022B (en) | Optical fiber isolator and method of use thereof | |
| WO2020113743A1 (en) | Small integrated free space circulator | |
| CN101320135A (en) | Polarization beam splitter prism | |
| CN106451054B (en) | Thermal depolarization complete compensation device of multi-pass laser amplifier and application method thereof | |
| CN103944052A (en) | Amplifier structure | |
| WO2023040746A1 (en) | Cylindrical vector fiber optic isolator and optical device | |
| US9696485B2 (en) | Optical circulator array | |
| CN203825232U (en) | Wavelength division multiplexing Faraday rotator mirror composite device | |
| US6954307B2 (en) | Four-port PM circulator | |
| US20030058536A1 (en) | Multi-port reflective optical isolator | |
| CN108363144B (en) | High-power optical fiber circulator based on curved surface optical fiber end cap | |
| CN113641013A (en) | Polarization-based bidirectional isolator and device thereof | |
| CN109768463B (en) | Pump isolation by polarization splitting | |
| GB2505180A (en) | Beam combiner with birefringent and isotropic prisms | |
| CN201352291Y (en) | Laser attenuator | |
| CN219758603U (en) | Dual-channel polarization independent magneto-optical isolator | |
| CN107703640B (en) | Dual-wavelength polarization beam combiner | |
| US20240055820A1 (en) | Folded hybrid assembly for doped fiber amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |