CN115173201B - Device and method for manufacturing linearly polarized light fiber laser output head - Google Patents
Device and method for manufacturing linearly polarized light fiber laser output head Download PDFInfo
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- CN115173201B CN115173201B CN202211099879.0A CN202211099879A CN115173201B CN 115173201 B CN115173201 B CN 115173201B CN 202211099879 A CN202211099879 A CN 202211099879A CN 115173201 B CN115173201 B CN 115173201B
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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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06712—Polarising fibre; Polariser
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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
- H01S3/10061—Polarization control
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- Optics & Photonics (AREA)
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Abstract
One technical scheme of the invention provides a device for preparing an output head of a linearly polarized fiber laser, which is characterized by comprising the following components: a tip body member gripper for forming a grip on the tip body member; the side wall of the output head main body part is provided with N linear polarization direction positioning points or positioning lines; the surface of the output head main body piece holder is provided with N positioning lines which are respectively aligned with the N positioning points or positioning lines in the linear polarization direction; a microscope for obtaining a microstructure formation image pattern; and the display unit is used for displaying the microstructure imaging pattern shot by the microscope in real time. The invention further provides a preparation method of the output head of the linearly polarized fiber laser. The invention can accurately control the polarization direction of the output light of the linearly polarized light laser output head, and is convenient for positioning the polarization direction in the subsequent integrated application; the system of the invention has simple structure.
Description
Technical Field
The invention relates to a device for preparing an output head of a linearly polarized light laser and a method for preparing the output head of the linearly polarized light laser by using the device.
Background
The fiber laser has the advantages of compact structure, easy integration, good beam quality, good heat dissipation, flexible and various working modes and the like, is paid more and more attention to research and industrial processing markets, successfully replaces the traditional solid laser in various fields, and even becomes an irreplaceable laser source in some fields. With the increasing requirement on output power, the fiber core power density of a high-power fiber laser is very high when the high-power fiber laser outputs laser, and the high-power fiber laser is easily damaged on the output end face of the fiber, so that the laser fails. The main solution to this problem is to fuse a large glass rod to the output end face of the fiber to reduce the output optical power density. Because still can't satisfy follow-up integrated use and damage easily after fusion bonding optic fibre and glass post, consequently need further encapsulate the glass post after the fusion bonding, form the laser instrument output head. However, in some specific application fields, such as spectrum synthesis, gravitational wave detection, coherent communication, laser radar, nonlinear frequency conversion, etc., a high-power fiber laser output with linear polarization is also required, and at the same time, special requirements are made on the position of the linear polarization direction relative to the output head main body component, so that subsequent positioning installation and accurate adjustment of the linear polarization direction can be realized.
In the utility model CN214503969U, the inventor proposes a structure in which a glass column to which an optical fiber is fused is assembled with an output head main body member, but does not propose a structure and a method for manufacturing an output head of a linearly polarized fiber laser. Technical personnel in the industry usually adopt the extinction ratio to detect the mode to fix a position the polarization direction of linearly polarized fiber laser, namely through actual output linear polarized fiber laser, set up one set of optics analyzer again and come actual measurement polarization direction, the structure is complicated, with high costs, the preparation man-hour is long, and certain safety risk also can be brought in the light-emitting operation.
Under certain conditions, the linear polarization direction is generally aligned with the slow axis or the fast axis of the polarization-maintaining optical fiber, so that in order to realize the output with the linear polarization direction aligned with a specific position of the output head main body piece, only the slow axis or the fast axis of the polarization-maintaining optical fiber needs to be controlled to be aligned with a specific position of the output head main body piece. However, since the size of the slow axis or the fast axis of the polarization maintaining fiber is very small, and is only in the order of micrometers, and the diameter of the output head body part is relatively large, generally above 1.5cm, it is difficult for a microscope to clearly present the slow axis or the fast axis of the polarization maintaining fiber and the output head body part at the same time, and thus it is difficult to achieve output alignment in the linear polarization direction with respect to a specific position of the output head body part. In addition, the slow axis or fast axis viewing surface of the polarization maintaining fiber is not generally in the same plane with the specific position of the output head body member, and therefore, certain obstruction is brought to the realization of the alignment output of the linear polarization direction relative to the specific position of the output head body member.
Disclosure of Invention
The invention aims to solve the problem that the polarization direction of linearly polarized light fiber laser is aligned and output relative to the specific position of a main body part of an output head of a fiber laser when the output head of the linearly polarized light fiber laser is prepared.
In order to achieve the above object, an embodiment of the present invention provides a device for preparing an output head of a linearly polarized fiber laser, including:
a body member gripper for forming a grip on the body member; the output head main body piece holder is provided with a locking mechanism which can be locked between a locking state and a loosening state when the working state is realized, when the locking mechanism is in the locking state, the output head main body piece is locked on the output head main body piece holder, and when the locking mechanism is in the loosening state, the output head main body piece can freely rotate around the axis of the output head main body piece holder;
the side wall of the output head main body part is provided with N linear polarization direction positioning points or positioning lines, N is more than or equal to 1, and the positioning points or the positioning lines are required alignment points or alignment lines of the polarization direction of the linearly polarized fiber laser relative to the specific position of the fiber laser output head main body part; the surface of the output head main body piece holder is provided with N positioning lines, any one of the N positioning lines, which is parallel to the central connecting line of two panda eyes of the imaging and polarization-maintaining optical fiber on the display unit, is defined as a main positioning line, and the N positioning lines are used for being respectively aligned with the N linear polarization direction positioning points or the positioning lines;
and (3) microscope: the glass column with the polarization maintaining fiber penetrates into the through hole of the output head main body piece from one end of the output head main body piece, so that after a positioning point or a positioning line on the side wall of the output head main body piece is aligned with a corresponding positioning line on the surface of the gripper of the output head main body piece, the microscope shoots the other end of the output head main body piece just opposite to the microscope, and an image pattern formed by the tiny knot is obtained;
the display unit is used for displaying a microstructure imaging pattern obtained by shooting through a microscope in real time, a positioning line aligned with a positioning point or a positioning line on the side wall of the output head main body part is imaged as an image line in the microstructure imaging pattern, an auxiliary line parallel to the image line of the main positioning line is displayed on the display unit, the auxiliary line and the microstructure form the output head main body part in the image pattern without intersecting, and the polarization-preserving fiber glass column is rotated, so that the central connecting line of two panda eyes of the polarization-preserving fiber is parallel to or perpendicular to the auxiliary line.
Preferably, the device also comprises a storage table; the display unit is placed on the object placing table; the microscope is fixed on the object placing table through a microscope support, and the position of the microscope can be adjusted; the output head main body piece holder is fixed on the object placing table.
The invention also provides a preparation method of the output head of the linearly polarized fiber laser, which is characterized in that the preparation device of the output head of the linearly polarized fiber laser comprises the following steps:
the method comprises the following steps: connecting the polarization maintaining fiber with the small end of the glass column to form a glass column with the polarization maintaining fiber, wherein the glass column with the polarization maintaining fiber is placed in the through hole of the output head main body part from one end of the output head main body part;
step two: the output head main body piece clamper is used for clamping the output head main body piece, the locking mechanism is in a locking state, and the output head main body piece is locked on the output head main body piece clamper;
step three: the microscope is used for shooting the other end of the output head main body piece, so that the glass column with the polarization maintaining optical fiber and the output head main body piece appear in the field range of the microscope;
step four: the locking mechanism of the output head main body piece gripper is in a loose state, the output head main body piece is rotated, and after all positioning points or positioning lines on the side wall of the output head main body piece are aligned with all corresponding positioning lines on the upper surface of the output head main body piece gripper, the locking mechanism is in a locked state again;
step five: the imaging of the positioning line on the display unit is the imaging line of the positioning line, an auxiliary line parallel to the imaging line of the main positioning line is displayed on the display unit, the auxiliary line and the image of the output head main body piece in the image pattern formed by the tiny structures are not intersected, and at the moment, the current positioning point or the positioning line on the side wall of the output head main body piece is mutually parallel to the auxiliary line;
step six: displaying a central connecting line of two panda eyes of the polarization maintaining optical fiber on a display unit, wherein the central connecting line is a slow axis of the polarization maintaining optical fiber, and a line vertical to the slow axis is a fast axis of the polarization maintaining optical fiber;
step seven: rotating the glass column with the polarization maintaining fiber to enable the central connecting line of the two panda eyes to be parallel to or perpendicular to the auxiliary line, wherein at the moment, the slow axis of the polarization maintaining fiber or the fast axis of the polarization maintaining fiber is aligned to the positioning point or the positioning line on the side wall of the output head main body part, namely the polarization direction of the linearly polarized fiber laser is aligned to the positioning point or the positioning line on the side wall of the output head main body part;
step eight: the glass column with the polarization maintaining fiber and the main body part of the output head are fixed together, so that the linearly polarized fiber laser output head with the stable and firm linear polarization direction aligned with the positioning point or the positioning line of the main body part of the output head is obtained.
Preferably, in the step eight: through the injecting glue hole injecting glue on the lateral wall of the output head main body piece, the positioned glass column with the polarization maintaining optical fiber is fixed with the output head main body piece together.
Compared with the prior art, the invention has the following advantages:
(1) The polarization direction of output light of the output head of the linearly polarized light fiber laser is accurately controlled, so that the polarization direction is conveniently positioned in subsequent integrated application;
(2) The system has simple structure, does not need to build an optical detection device to actually output the linear polarization fiber laser to adjust the polarization direction, and is safe to operate;
(3) The preparation process is simple, the working time is short, and the cost is low.
Drawings
FIG. 1 is a schematic diagram of the general structure of a device for preparing an output head of a linearly polarized fiber laser provided by the invention;
FIG. 2 illustrates a glass column with polarization maintaining fiber;
figure 3 illustrates the alignment of locating points or lines on the side walls of the body member of the output stud with locating lines on the upper surface of the body member gripper of the output stud;
FIG. 4 illustrates image lines and auxiliary lines;
FIG. 5 is a schematic view of a line connecting centers of panda eyes;
FIG. 6 illustrates the face of the body member gripper of the output head provided with two alignment lines;
fig. 7 illustrates the image lines and the auxiliary lines in the case of two positioning lines.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
The invention discloses a device for preparing an output head of a linearly polarized light fiber laser, which comprises an object placing table 2, a display unit 1, a microscope 3, a microscope bracket 4 and an output head main body piece clamper 7.
The object placing table 2: for placing the display unit 1 and for fixing the microscope stand 4, the output head body piece clamper 7.
Display unit 1: for displaying and magnifying the imaged pattern of the microscope 3.
And (3) a microscope: the device is used for amplifying the fine structures such as the polarization-maintaining optical fiber glass column 5, the output head main body piece 6, the output head main body piece gripper 7 and the like, and the amplification factor is adjustable.
And (4) a microscope support 4: is used for clamping the microscope 3, can adjust the up-down position and the front-back position of the microscope 3, and can be fixed on the object placing table 2.
Glass column with polarization maintaining fiber 5: the small end of the glass column is connected with a polarization maintaining fiber and used for outputting linear polarization fiber laser.
Output head main body member 6: the side wall of the output head main body part 6 comprises one or more linear polarization direction positioning points or positioning lines 6-1, and the positioning points or positioning lines 6-1 are alignment points or alignment lines of the polarization direction of the required linearly polarized light fiber laser relative to the specific position of the optical fiber laser output head main body part.
Output-head main-body piece holder 7: the output head main body piece 6 can be horizontally fixed or vertically fixed, and the embodiment takes a vertical fixing mode as a detailed explanation object. The output head main body piece holder 7 includes one or more positioning lines 7-1 on an upper surface thereof in parallel with each other, and the number of the positioning lines 7-1 is equivalent to the number of positioning points or the positioning lines 6-1 and corresponds one to one. The tip body holder 7 has a locking mechanism, and after the tip body 6 is inserted into the tip body holder 7, the position of the tip body 6 is locked by the locking mechanism. When the locking mechanism is released, the output head body member 6 can rotate freely. In this embodiment, the locking mechanism is implemented using a plurality of pre-locking knobs, as shown in fig. 3.
The invention provides a preparation method of an output head of a linearly polarized optical fiber laser, which comprises the following steps:
the method comprises the following steps: place display element 1 on putting thing platform 2, microscope stand 4 is fixed microscope 3 to putting thing platform 2 on, and microscope 3 passes through data transmission line and is connected with display element 1.
Step two: the polarization maintaining optical fiber 5-2 is connected with the small end of the glass column 5-1 to form the glass column 5 with the polarization maintaining optical fiber, and the connection mode of the polarization maintaining optical fiber 5-2 and the glass column 5-1 can adopt the modes of electrode heating fusion, carbon dioxide laser welding and the like. The glass column 5 with the polarization maintaining fiber is placed in the through hole of the output head main body piece 6, the output head main body piece 6 is pre-locked by the output head main body piece clamper 7, and then the output head main body piece is fixed on the object placing table 2.
Step three: the position of the microscope 3 is adjusted by adjusting the transverse and longitudinal positions of the microscope stand 4 so that the polarization maintaining fiber glass column 5 and the output head main body member 6 appear within the field of view of the microscope 3.
Step four: the pre-lock knob of the nosepiece body member holder 7 is released, the nosepiece body member 6 is rotated such that the location point or line 6-1 on the sidewall of the nosepiece body member 6 is aligned with the location line 7-1 on the upper surface of the nosepiece body member holder 7, and then the nosepiece body member holder 7 is locked.
Step five: the magnification of the microscope stand 4 and the microscope 3 is adjusted so that the positioning line 7-1 of the upper surface of the output head main body member holder 7 can be clearly shown on the display unit 1, and the image of the positioning line 7-1 on the display unit 1 is an image line 1-1 of the positioning line 7-1. An auxiliary line 1-2 is drawn on the display unit 1 parallel to the image line 1-1 of the positioning line 7-1 by using the imaging software of the microscope 3 or an external brush. At this time, the positioning points or lines 6-1 on the side walls of the output head main body member 6 are parallel to the auxiliary lines 1-2.
Step six: the magnification of the microscope 3 is adjusted, so that panda eyes of the polarization maintaining fiber 5-2 can be clearly shown on the display unit 1, the central connecting line of the two panda eyes is the slow axis of the polarization maintaining fiber 5-2, and the line perpendicular to the slow axis is the fast axis of the polarization maintaining fiber 5-2. The connecting line of the imaging centers of the two panda eyes on the display unit 1 is a connecting line 1-3 of the centers of the panda eyes, the glass column 5 with the polarization-maintaining fiber is slowly rotated, so that the connecting line 1-3 of the centers of the panda eyes is parallel to or perpendicular to the auxiliary line 1-2, at the moment, the slow axis of the polarization-maintaining fiber or the fast axis of the polarization-maintaining fiber is aligned with the positioning point or the positioning line 6-1 on the side wall of the output head main body part 6, namely, the polarization direction of the linearly polarized light fiber laser is aligned with the positioning point or the positioning line 6-1 on the side wall of the output head main body part 6.
Step seven: and finally, injecting glue through glue injection holes 6-2 in the side wall of the output head main body part 6, and fixing the positioned glass column 5 with the polarization maintaining fiber and the output head main body part 6 together, thereby obtaining the stable and firm linearly polarized fiber laser output head with the linear polarization direction aligned with the positioning point or the positioning line of the output head main body part.
Example 2
As shown in fig. 6, the difference between the apparatus for manufacturing an output head of a linearly polarized fiber laser disclosed in this embodiment and embodiment 1 is that: in the embodiment, a positioning point 6-1 and a positioning line 6-3 are arranged on the side wall of the output head main body part 6, and the central angle formed by the positioning point 6-1 and the positioning line 6-3 on the cylindrical section of the output head main body part 6 is 90 degrees; correspondingly, two mutually perpendicular positioning lines 7-1 and 7-2 are provided on the upper surface of the output head body member holder 7.
The difference between the method for manufacturing the output head of the linearly polarized fiber laser disclosed in this embodiment and embodiment 1 is that: in the fourth step, after the pre-locking knob of the output head main body piece holder 7 is loosened, the output head main body piece 6 is rotated, so that the positioning point 6-1 on the side wall of the output head main body piece 6 is aligned with the positioning line 7-1, and meanwhile, the positioning line 6-3 is aligned with the positioning line 7-2; in step five, the image of the location line 7-1 on the display unit 1 is the image line 1-1 of the location line 7-1, the image of the location line 7-2 on the display unit 1 is the image line 1-4 of the location line 7-2, and the auxiliary line 1-2 is parallel to the image line 1-1 and perpendicular to the image line 1-4.
Claims (4)
1. A linearly polarized light laser output head preparation device is characterized by comprising:
a tip body member gripper for forming a grip on the tip body member; the output head main body piece holder is provided with a locking mechanism, the working state of which can be switched between a locking state and a loosening state, when the locking mechanism is in the locking state, the output head main body piece is locked on the output head main body piece holder, and when the locking mechanism is in the loosening state, the output head main body piece can freely rotate around the axis of the output head main body piece holder;
the side wall of the output head main body part is provided with N linear polarization direction positioning points or positioning lines, N is more than or equal to 1, and the positioning points or the positioning lines are alignment points or alignment lines for aligning the polarization direction of the linearly polarized fiber laser relative to the specific position of the fiber laser output head main body part; the surface of the output head main body piece holder is provided with N positioning lines, any one of the N positioning lines, which is parallel to the central connecting line of two panda eyes of the polarization maintaining fiber and imaged on the display unit, is defined as a main positioning line, and the N positioning lines are used for being aligned with the N linear polarization direction positioning points or the positioning lines respectively;
a microscope, wherein the glass column with the polarization-maintaining optical fiber penetrates into the through hole of the output head main body piece from one end of the output head main body piece, so that after a positioning point or a positioning line on the side wall of the output head main body piece is aligned with a corresponding positioning line on the surface of the gripper of the output head main body piece, the microscope shoots the other end of the output head main body piece just opposite to the microscope, and a micro-structure is obtained to form an image pattern;
the display unit is used for displaying a microstructure imaging pattern obtained by shooting through a microscope in real time, a positioning line aligned with a positioning point or a positioning line on the side wall of the output head main body part is imaged as an image line in the microstructure imaging pattern, an auxiliary line parallel to the image line of the main positioning line is displayed on the display unit, the auxiliary line and the microstructure form the output head main body part in the image pattern without intersecting, and the polarization-preserving fiber glass column is rotated, so that the central connecting line of two panda eyes of the polarization-preserving fiber is parallel to or perpendicular to the auxiliary line.
2. The apparatus of claim 1, further comprising a stage; the display unit is placed on the object placing table; the microscope is fixed on the object placing table through a microscope support, and the position of the microscope can be adjusted; the output head main body piece holder is fixed on the object placing table.
3. A linearly polarized optical laser output head preparation method is characterized in that the linearly polarized optical laser output head preparation device of claim 1 is adopted, and comprises the following steps:
the method comprises the following steps: connecting the polarization maintaining optical fiber with the small end of the glass column to form a glass column with the polarization maintaining optical fiber, wherein the glass column with the polarization maintaining optical fiber is placed in the through hole of the output head main body piece from one end of the output head main body piece;
step two: the output head main body piece clamper is used for clamping the output head main body piece, the locking mechanism is in a locking state, and the output head main body piece is locked on the output head main body piece clamper;
step three: the microscope is used for shooting the other end of the output head main body piece, so that the glass column with the polarization maintaining optical fiber and the output head main body piece appear in the field range of the microscope;
step four: rotating the output head main body piece to align all positioning points or positioning lines on the side wall of the output head main body piece with all positioning lines corresponding to the upper surface of the output head main body piece holder, and then enabling the locking mechanism to be in a locking state again;
step five: the imaging of the positioning line on the display unit is the imaging line of the positioning line, an auxiliary line parallel to the imaging line of the main positioning line is displayed on the display unit, the auxiliary line and the image of the output head main body piece in the image pattern formed by the tiny structures are not intersected, and at the moment, the current positioning point or the positioning line on the side wall of the output head main body piece is mutually parallel to the auxiliary line;
step six: displaying a central connecting line of two panda eyes of the polarization maintaining optical fiber on a display unit, wherein the central connecting line is a slow axis of the polarization maintaining optical fiber, and a line vertical to the slow axis is a fast axis of the polarization maintaining optical fiber;
step seven: rotating the glass column with the polarization maintaining optical fiber to enable the central connecting line of the two panda eyes to be parallel to or perpendicular to the auxiliary line, wherein at the moment, the slow axis of the polarization maintaining optical fiber or the fast axis of the polarization maintaining optical fiber is aligned with the positioning point or the positioning line on the side wall of the output head main body part, namely the polarization direction of the linearly polarized optical fiber laser is aligned with the positioning point or the positioning line on the side wall of the output head main body part;
step eight: the glass column with the polarization maintaining fiber and the main body part of the output head are fixed together, so that the linearly polarized fiber laser output head with the stable and firm linear polarization direction aligned with the positioning point or the positioning line of the main body part of the output head is obtained.
4. A linearly polarized optical laser output head preparation method as claimed in claim 3, wherein in said step eight: through the injecting glue hole injecting glue on the lateral wall of the output head main body piece, the positioned glass column with the polarization maintaining optical fiber is fixed with the output head main body piece together.
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| CN202211099879.0A CN115173201B (en) | 2022-09-09 | 2022-09-09 | Device and method for manufacturing linearly polarized light fiber laser output head |
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| CN202211099879.0A CN115173201B (en) | 2022-09-09 | 2022-09-09 | Device and method for manufacturing linearly polarized light fiber laser output head |
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| CN115173201B true CN115173201B (en) | 2022-11-29 |
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| JP2005274460A (en) * | 2004-03-25 | 2005-10-06 | National Institute For Materials Science | Near-field optical microscope and polarization evaluating method using the same |
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| CN103292731A (en) * | 2013-05-16 | 2013-09-11 | 浙江大学 | Geometrical parameter testing device and method used for panda-shaped polarization maintaining optical fiber end faces |
| CN110456464A (en) * | 2019-08-12 | 2019-11-15 | 大连藏龙光电子科技有限公司 | A kind of coupling welding system and method for panda type polarization-preserving fiber and lens |
| CN113885136A (en) * | 2021-09-14 | 2022-01-04 | 广东国志激光技术有限公司 | Preparation method of all-fiber polarizer |
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2022
- 2022-09-09 CN CN202211099879.0A patent/CN115173201B/en active Active
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| JP2000249646A (en) * | 1999-03-01 | 2000-09-14 | Canon Inc | Near visual field optical microscope device |
| JP2001042163A (en) * | 1999-07-29 | 2001-02-16 | Tatsuta Electric Wire & Cable Co Ltd | Method for adjusting connector key for polarization maintaining fiber and its adjusting device |
| JP2005274460A (en) * | 2004-03-25 | 2005-10-06 | National Institute For Materials Science | Near-field optical microscope and polarization evaluating method using the same |
| CN102368101A (en) * | 2011-09-01 | 2012-03-07 | 上海大学 | Apparatus for manufacturing pointer polarization maintaining long period fiber grating and method thereof |
| CN103292731A (en) * | 2013-05-16 | 2013-09-11 | 浙江大学 | Geometrical parameter testing device and method used for panda-shaped polarization maintaining optical fiber end faces |
| CN110456464A (en) * | 2019-08-12 | 2019-11-15 | 大连藏龙光电子科技有限公司 | A kind of coupling welding system and method for panda type polarization-preserving fiber and lens |
| CN113885136A (en) * | 2021-09-14 | 2022-01-04 | 广东国志激光技术有限公司 | Preparation method of all-fiber polarizer |
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