CN110286442B - Optical fiber coupler with adjustable coupling ratio - Google Patents
Optical fiber coupler with adjustable coupling ratio Download PDFInfo
- Publication number
- CN110286442B CN110286442B CN201910694679.1A CN201910694679A CN110286442B CN 110286442 B CN110286442 B CN 110286442B CN 201910694679 A CN201910694679 A CN 201910694679A CN 110286442 B CN110286442 B CN 110286442B
- Authority
- CN
- China
- Prior art keywords
- fiber
- tapered
- optical fiber
- probe
- coupler
- 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
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
Abstract
The invention provides an optical fiber coupler with an adjustable coupling ratio, which is specifically set as follows: a tapered fiber and a tapered fiber probe; the tapered optical fiber comprises a fiber core and a cladding wrapped on the outer surface of the fiber core, and the radiuses of the cladding and the fiber core are changed according to a tapering shape function; the tapered optical fiber probe is placed in the taper waist area of the tapered optical fiber and is in the shape of the tapered optical fiber after being pulled off, and the tapered optical fiber probe and the tapered optical fiber are adsorbed at the taper waist area through van der Waals force and electrostatic force. The optical fibers are welded according to a fixed included angle without being stuck, a coupling area is formed in the conical waist area in an adsorption mode, and the coupling ratio between the two optical fibers can be changed by adjusting the included angle between the probe and the conical waist area of the conical optical fibers; the included angle and the coupling ratio are approximately in a linear relationship; the coupling ratio is approximately 50 percent to 50 percent when the included angle is 30 degrees. The optical fiber coupler with the structure can ideally adjust or control optical signals and reduce the complexity and the cost of the optical fiber coupler.
Description
Technical Field
The invention relates to the field of laser, in particular to an optical fiber coupler capable of realizing adjustable laser output and coupling ratio.
Background
The optical fiber Coupler (Coupler), also called Splitter (Splitter), connector, adapter, optical fiber flange, is an element for realizing optical signal splitting/combining or for extending optical fiber link, belongs to the field of optical passive elements, is applied to telecommunication network, cable television network, subscriber loop system, and local area network, and is one of the most important optical passive devices with multiple functions and multiple purposes. With the intensive research of the optical fiber coupler, three manufacturing methods are mainly polishing, etching and fused biconical taper. The fused biconical taper method is widely used because of its simple operation method, low manufacturing cost and low device loss.
With the rapid development of fiber couplers, polarization maintaining fiber couplers have also begun to appear. The polarization-maintaining fiber coupler has the advantages of low polarization crosstalk, low additional loss, unchanged polarization state of linearly polarized light in the transmission process and the like. In recent years, in order to vigorously develop and research polarization-maintaining optical fiber couplers, a large amount of money is invested in the country, a large number of scientific researchers are added into a research team of polarization-maintaining optical fiber couplers, and polarization-maintaining optical fiber couplers are rapidly developed and widely applied in the future. Meanwhile, the single-mode polarization fiber coupler has good performance advantages as a polarization-maintaining fiber coupler, can effectively solve the problems of polarization crosstalk, polarization-dependent loss, polarization mode dispersion and the like, and improves the stability of an optical communication system.
In addition to the polarization maintaining fiber couplers described above, one of the most important devices in fiber optic systems is a directional coupler based on photonic crystal fibers. In recent years, research on photonic crystal fiber couplers has attracted the interest of many researchers and has achieved certain results. The photonic crystal fiber coupler can be divided into three categories according to the structure of the photonic crystal fiber coupler, namely a fused cone type photonic crystal fiber coupler, a side polishing type photonic crystal fiber coupler and a double-core or multi-core photonic crystal fiber coupler. In order to use photonic crystal fibers in communication systems, some basic fiber components of photonic crystal fibers need to be provided. Therefore, the future prospect of the photonic crystal fiber coupler is certainly very considerable.
In recent years, a new type of fiber optic coupler, i.e., a fiber grating coupler, has emerged. Fiber bragg grating couplers can be easily designed for selective wavelength operation, especially for coarse wavelength division multiplexing systems. Single mode fibers form a long period fiber grating device that allows intense light to couple from a core mode to a set of cladding modes selected at a particular wavelength, thereby acting as a band stop filter. Early studies of grating fiber couplers were mainly to introduce bragg gratings in waveguides or fiber couplers to achieve wavelength selectivity. One disadvantage of bragg grating devices is that operating in the reflective state, the reflected signal is recovered with unwanted optical feedback, causing additional losses. On the other hand, the long-period fiber grating coupler has no reflection problem during the transmission process, and the advantages greatly promote the wide application of the fiber grating coupler, so that the potential market is huge.
Fiber optic couplers are becoming more and more important and will become an integral part of the fiber optic communication and sensing arts. Various optical fiber couplers with excellent performance, such as a polarization optical fiber coupler, a photonic crystal optical fiber coupler and the like, develop rapidly, and have considerable prospects.
The most widely used single-mode fiber coupler, 2 × 2, has the typical characteristics of having two input ends and two output ends, with a coupling area in the middle, and a drawing part made by melting and drawing process forms a conical coupling area, drawing makes the light energy of the core area expand to the outside of the core, and at the same time, makes the two fiber cores close to each other, both these two functions enhance the coupling.
Patent 2014108108669 proposes an optical fiber fusion device based on tapering method and its manufacturing method, which is to obtain a single mode fiber with a preset diameter by tapering the single mode fiber according to a preset diameter; obtaining a single-mode optical fiber cone with a preset angle by adopting a tapering mode for the single-mode optical fiber with the preset diameter according to the preset angle; and obtaining the optical fiber coupler by adopting a sticking and melting mode for the single-mode optical fiber cone and the few-mode optical fiber with the preset angle. And (3) obtaining the single-mode optical fiber cone with the preset angle by adopting a tapering mode according to the obtained single-mode optical fiber with the preset diameter at the preset angle.
In the prior art, an optical fiber coupler device is ground, polished, embedded or attached and fusion welded according to a preset angle, once the device is shaped, parameters of the device cannot be changed, a mode field and a coupling ratio of the device cannot be adjusted, and higher wavelength dependence cannot be avoided.
Disclosure of Invention
The invention solves the technical problem that the coupling ratio of the existing optical fiber coupler is not adjustable, and provides an optical fiber coupler with an adjustable coupling ratio.
In order to achieve the purpose, the invention provides the following scheme:
a tunable coupling ratio fiber optic coupler comprising: a tapered optical fiber and a tapered fiber probe; the tapered optical fiber includes:
the fiber comprises a fiber core and a cladding wrapped on the outer surface of the fiber core; the radius of the cladding and the fiber core of the fiber-reinforced composite material is changed according to a tapering shape function; the tapered optical fiber probe is a tapered optical fiber with an outer tapered structure at one end;
the tapered optical fiber probe is placed in the taper waist area of the tapered optical fiber; the tapered fiber probe and the tapered fiber are attracted by van der waals and electrostatic forces at the waist region.
The tapered fiber probe and the tapered fiber are configured to be disposed in parallel at the tapered waist region or the tapered fiber probe surrounds the tapered fiber.
The tapered optical fiber probe comprises a fiber core and a cladding wrapped on the outer surface of the fiber core;
the tapered optical fiber probe is in a shape of a tapered optical fiber after being broken.
The tapered optical fiber and the tapered optical fiber probe are both manufactured by a method of melting and tapering a single-mode optical fiber, and the tapered optical fiber
The diameter of the waist of the cone is less than or equal to 5 mu m.
Preferably, the tapered optical fiber has an initial radius of 62.5 μm, a core radius of 4.1 μm, a taper length of 14mm, a cladding radius of 2.765 μm in the taper waist region, a core radius of 0.1814 μm, a cladding refractive index of 1.4629, and a core refractive index of 1.4682.
The preparation method of the tapered optical fiber probe comprises the step of breaking or cutting the tapered optical fiber after tapering.
Optionally, the tapered optical fiber probe is placed in a waist region of the tapered optical fiber, and the overlapping length is 2 mm.
Optionally, the central wavelength of the incident light of the optical fiber coupler with the adjustable coupling ratio is 1550nm or 1064 nm. .
The optical fiber coupler with the adjustable coupling ratio adjusts the light intensity coupled into the probe optical fiber by adjusting the size of an included angle between the probe and the conical optical fiber cone waist region, and further adjusts the coupling ratio of the optical fiber coupler.
Optionally, the angle α between the tapered fiber probe and the tapered fiber taper waist region varies from 5 ° to 90 °.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention provides an optical fiber coupler with an adjustable coupling ratio. The optical fiber is welded according to a fixed included angle without traditional grinding and splicing or sticking and melting, a coupling area can be formed in the secondary cone waist area only by adsorbing the cone-shaped optical fiber probe to the cone waist area of the cone-shaped optical fiber by Van der Waals force, and the coupling ratio between the two optical fibers can be changed by adjusting the included angle between the probe and the cone waist area of the cone-shaped optical fiber; the included angle and the coupling ratio are approximately in a linear relationship; the coupling ratio is approximately 50 percent to 50 percent when the included angle is 30 degrees. The optical fiber coupler with the structure can ideally adjust or control optical signals and reduce the complexity and the cost of the optical fiber coupler.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of a tunable coupling ratio fiber coupler according to the present invention;
FIG. 2 is a schematic view of a tapered fiber probe surrounding the tapered fiber;
FIG. 3 is a diagram of mode field distributions for different angles, where: (a) a mode field distribution diagram with an included angle of 5 degrees, (b) a mode field distribution diagram with an included angle of 30 degrees, (c) a mode field distribution diagram with an included angle of 70 degrees, and (d) a mode field distribution diagram with an included angle of 90 degrees;
FIG. 4 is a diagram illustrating the optical field intensity distribution of the optical fiber coupler with an included angle of 30 degrees according to the present invention;
FIG. 5 is a graph of the angle versus coupling ratio provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a coupling ratio adjustable optical fiber coupler, which can adjust or control optical signals ideally and reduce the complexity and the cost of the optical fiber coupler.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic structural diagram of a coupling ratio adjustable optical fiber coupler according to the present invention, and as shown in fig. 1, the coupling ratio adjustable optical fiber coupler includes: a tapered optical fiber 1 and a tapered optical fiber probe 2; the tapered optical fiber 1 comprises a fiber core 1-1 and a cladding 1-2 wrapped on the outer surface of the fiber core 1-1; the radiuses of the cladding 1-2 and the fiber core 1-1 are changed according to a tapering shape function; the tapered optical fiber probe 2 comprises a fiber core 2-1 and a cladding 2-2 wrapped on the outer surface of the fiber core 2-1; the tapered optical fiber probe 2 is placed in the taper waist area of the tapered optical fiber 1 and is in the shape of a broken tapered optical fiber; the tapered optical fiber probe is placed in the taper waist area of the tapered optical fiber; the tapered fiber probe and the tapered fiber are attracted by van der waals forces at the waist region.
The working principle of the coupling ratio adjustable optical fiber coupler is as follows: as shown in fig. 1, byThe transmission characteristic and the coupling characteristic which are special for the conical micro-nano optical fiber are used for realizing the transmission characteristic and the coupling characteristic. Tapering a common single mode optical fiber into a tapered optical fiber by a fused tapering method, wherein r0Is the radius of the single mode fiber, L is the pre-tapering length of the single mode fiber, L0Is the initial length of the single-mode fiber before tapering, epsilon is the retraction factor, rWFor the waist diameter, assume the waist diameter L of the tapered fiberWIs homogeneous.
And tapering by a fused tapering method to prepare a tapered optical fiber probe, and placing the probe on the beam waist region of the tapered optical fiber for optical distribution and coupling. The relationship between the drawing length of the tapered optical fiber manufactured by the fusion tapering method and the radius r of the optical fiber is as follows:
the tunable fiber coupler mainly utilizes the coupling between two tapered fibers to realize the attenuation of optical signals. Therefore, the attenuator model is theoretically analyzed by adopting the coupled wave theory. Considering that the biconical fiber and the probe-type tapered fiber are single-mode step-change weak light guide fibers and meet the condition of local mode coupling, the theoretical analysis can be carried out by using a local mode coupling theory. Neglecting the self-coupling effect under the approximation of weak conduction and weak coupling, the coupling equation is as follows assuming that the optical fiber has no absorption loss:
where A (z), B (z) are the mode field amplitudes of the two fibers,
is the longitudinal mode propagation constant of the fiber in the encouraged state,
is a coupling coefficient, which can be considered as a practical condition
And
the values of (d) are equal, solving for:
the coupling coefficient is:
where ρ is the fiber radius; d is the distance between the centers of the two fibers; u is the core transverse propagation constant; w is the cladding transverse attenuation constant; v is the normalized frequency of the isolated fiber; k0、K1Are zero and first order modified second class Bessel functions. The power distribution of the coupler is given by:
F2is the maximum coupled power between the two fibers. It can be found from the above equations (6) and (7) that the power of the coupling regions is periodically exchanged. This shows that by choosing a suitable interaction length, an arbitrary power distribution between the two interacting waveguides can be achieved.
When the transmissivity of the coupling optical system is not considered, the coupling efficiency mainly depends on the overlapping area of the incident light field distributed in the basement membrane field distribution in the single-mode optical fiber, and the integral area is the whole coupling surface. The coupling ratio of the optical attenuator is defined as the ratio of the power remaining in the tapered fiber to the transmitted power coupled into the fiber probe:
Eif(r, θ) is the incident field strength, Eff(r, θ) is the mode field distribution coupled to the biconical fiber, Ejf(r, θ) is the mode field distribution coupled to the tapered probe, r is the tapered fiber radius, and θ is the angle of incidence. From the above analysis, it is found that the coupling ratio has a large relationship with the tapered fiber radius r and the incident angle θ.
The preparation method of the tapered optical fiber mainly comprises three methods, namely a polishing method, an etching method and a fused biconical taper method. The optical fiber taper manufactured by the fusion-drawing method is characterized in that the diameters of a cladding and a fiber core of the optical fiber are tapered along the axial direction of the optical fiber. It is believed that the ratio of the diameters of the cladding and core remains constant throughout the waist region. The tapered optical fiber probe is used for rapidly breaking or cutting off the tapered optical fiber, and the section naturally forms a smooth plane. The method for manufacturing the optical fiber taper is easy to control, has good repeatability, has smooth surface after taper forming, and is an ideal manufacturing method.
The invention selects SME-28e single mode fiber produced by corning company as tapered fiber, and the cladding radius R162.5 μm, core radius R24.1 μm, and a taper length l of 14 mm. Calculating the cladding radius R of the conical waist region of the tapered optical fiber by using the tapering shape function112.765 μm core radius R210.1814 μm, cladding refractive index n11.4629 core refractive index n21.4682, the probe is the same size as the tapered fiber. The model solution is adopted as simulation software, an EME resolver is used for calculating the whole coupling length, and the EME method is a complete vector and bidirectional technology for solving Maxwell equations. The method relies on the modal decomposition of the electromagnetic field into a fundamental set of eigenmodes, which is calculated by dividing the geometry into a number of cells and then solving for the modes at the interfaces between adjacent cells. Incident light with wavelength of 1550nm is selected to be injected into the core of the tapered fiber from port 1 (as shown in fig. 1), and a monitor is set to observe the field distribution of the coupler.
In order to increase the contact surface, the tapered fiber probe surrounds the tapered fiber for several turns, as shown in fig. 2, so that a better adsorption effect can be obtained.
Fig. 3(a) to 3(d) show the mode field distribution diagrams of the present invention with the included angles of 5 °,30 °,70 ° and 90 °, respectively, from fig. 3, it can be seen that the optical field coupled into the probe gradually decreases with the increase of the included angle, when the included angle α increases to 70 °, as shown in fig. 3(c), it can be seen that there is no optical field distribution in the fiber at the raised portion of the probe except for the portion where the probe is closely attached to the taper waist region of the tapered fiber, i.e., there is no optical output at the end of the fiber, from fig. 3(d), it can be seen that there is no optical field distribution at the raised portion of the probe after the included angle α is greater than 70 °, and the critical angle of the optical field output can be determined to be approximately 60 ° by mode field distribution simulation.
Fig. 4 is a graph showing the optical field intensity distribution of the optical fiber coupler with an included angle of 30 ° according to the present invention, a coupling ratio is calculated as an example when the angle α is 30 ° as shown in fig. 3(b), the coupling mode field distribution curve of the optical fiber coupler is shown in fig. 4, the left region is the mode field of the tapered optical fiber, and the right region is the mode field of the tapered probe, which are integrated and compared, respectively, to obtain the coupling ratio of the optical fiber coupler, when the angle α is 30 °, the coupling ratio is 1.05, which indicates that the optical field intensity of the optical field in the probe is the same as that of the tapered optical fiber (i.e., the coupling ratio is approximately 50%: 50%).
Fig. 5 is a graph showing the relationship between the angle α between the probe and the tapered waist region of the optical fiber and the coupling ratio η, it can be seen that the coupling ratio η increases with the increase of the angle α, and the curve is linearly fitted, it can be seen that the relationship between the angle α and the coupling ratio η is approximately equal to the straight line y 0.48843+0.02038x, so that the novel optical fiber coupler with the structure can perform linear modulation of light.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A tunable coupling ratio fiber optic coupler, comprising: a tapered optical fiber and a tapered fiber probe;
the tapered optical fiber comprises a fiber core and a cladding wrapped on the outer surface of the fiber core; the radius of the cladding and the fiber core of the fiber-reinforced composite material is changed according to a tapering shape function;
the tapered optical fiber probe is a tapered optical fiber with an outer tapered structure at one end;
the tapered optical fiber probe is placed in the taper waist area of the tapered optical fiber, the tapered optical fiber probe and the tapered optical fiber are adsorbed at the taper waist area through van der Waals force and electrostatic force, and the included angle α between the tapered optical fiber probe and the taper waist area of the tapered optical fiber is changed from 5 degrees to 90 degrees;
the coupling ratio is the ratio of the power remaining in the tapered fiber to the transmitted power coupled into the tapered fiber probe.
2. The adjustable coupling ratio fiber coupler of claim 1, wherein the tapered fiber probe and the tapered fiber are configured to be disposed in parallel at the waist region.
3. The adjustable coupling ratio fiber coupler of claim 1, wherein the tapered fiber probe and the tapered fiber are configured at the waist region such that the tapered fiber probe surrounds the tapered fiber.
4. The adjustable-coupling-ratio fiber coupler of claim 1, wherein the tapered optical fiber and the tapered fiber probe are both made by a single-mode fiber fused biconical taper method, and the taper waist diameter of the tapered optical fiber is less than or equal to 5 μm.
5. The adjustable-coupling-ratio fiber coupler of claim 4, wherein the initial radius is 62.5 μm, the core radius is 4.1 μm, the taper length is 14mm, the cladding radius in the taper waist region is 2.765 μm, the core radius is 0.1814 μm, the cladding index is 1.4629, and the core index is 1.4682.
6. The adjustable coupling ratio fiber coupler of claim 2, wherein the tapered fiber probe is prepared by: and (4) breaking or cutting off the tapered optical fiber after tapering.
7. The adjustable coupling ratio fiber coupler of claim 2, wherein the tapered fiber probe is disposed at the waist region of the tapered fiber, and the overlapping length is 2 mm.
8. The adjustable-coupling-ratio optical fiber coupler according to claim 2 or 3, wherein the central wavelength of the incident light is 1550nm or 1064 nm.
9. The adjustable coupling ratio fiber coupler of claim 2 or 3, wherein the coupling ratio of the fiber coupler is adjusted by adjusting the angle between the tapered fiber probe and the tapered fiber waist region to adjust the intensity of light coupled into the tapered fiber probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910694679.1A CN110286442B (en) | 2019-07-30 | 2019-07-30 | Optical fiber coupler with adjustable coupling ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910694679.1A CN110286442B (en) | 2019-07-30 | 2019-07-30 | Optical fiber coupler with adjustable coupling ratio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110286442A CN110286442A (en) | 2019-09-27 |
| CN110286442B true CN110286442B (en) | 2020-07-07 |
Family
ID=68024364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910694679.1A Active CN110286442B (en) | 2019-07-30 | 2019-07-30 | Optical fiber coupler with adjustable coupling ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110286442B (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242082A (en) * | 1996-11-22 | 2000-01-19 | 考金特光学技术公司 | Method for coupling light from single fiberoptic to a multi-fiber bundle with enhanced field uniformity and better coupling efficiency |
| JP2000141073A (en) * | 1998-11-10 | 2000-05-23 | Matsushita Electric Ind Co Ltd | Ld array optical wave guide |
| US8031991B2 (en) * | 2008-05-28 | 2011-10-04 | Lightwire Inc. | Low index, large mode field diameter optical coupler |
| CN101424773A (en) * | 2008-12-18 | 2009-05-06 | 浙江大学 | All-optical-fiber fabry-perot resonant cavity based on micro optical fiber annular mirror and method for making same |
| CN102749675B (en) * | 2012-06-27 | 2014-07-02 | 暨南大学 | Structural long-period optical fiber grating |
| CN104020567A (en) * | 2014-05-13 | 2014-09-03 | 西安电子科技大学 | Hollow light beam converting device |
| US9696498B2 (en) * | 2015-05-04 | 2017-07-04 | Huawei Technologies Co., Ltd. | Three-dimensional (3D) photonic chip-to-fiber interposer |
| CN105676365A (en) * | 2016-03-29 | 2016-06-15 | 索尔思光电（成都）有限公司 | Optical coupling structure and plug in-type optical assembly |
| WO2018119267A1 (en) * | 2016-12-22 | 2018-06-28 | Magic Leap, Inc. | Methods and systems for fabrication of shaped fiber elements for scanning fiber displays |
| CN107526135B (en) * | 2017-10-19 | 2019-05-03 | 兰州大学 | Upper downloading filter based on micro-nano fiber toroidal cavity resonator and preparation method thereof |
| CN109407215A (en) * | 2018-11-15 | 2019-03-01 | 杭州芯耘光电科技有限公司 | A kind of coupling process of silicon based opto-electronics chip and single mode optical fiber |
-
2019
- 2019-07-30 CN CN201910694679.1A patent/CN110286442B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110286442A (en) | 2019-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5307558B2 (en) | Multi-core photonic bandgap fiber with inter-core coupling | |
| US6418258B1 (en) | Microstructured optical fiber with improved transmission efficiency and durability | |
| US4810052A (en) | Fiber optic bidirectional data bus tap | |
| CN101339273B (en) | Optical fibre mode converter | |
| CN104483735B (en) | All-fiber mode converter light system | |
| US9348086B2 (en) | Few-mode optical fibers | |
| CN100541249C (en) | Two-dimensional complete band gap photon crystal and depolarization beam splitter | |
| CN111061011A (en) | Improved single-mode fiber and multi-core fiber coupler and preparation method thereof | |
| CN102289032A (en) | Terahertz photonic crystal fiber coupler | |
| Zhao et al. | A stable twin-core-fiber-based integrated coupler fabricated by thermally diffused core technique | |
| CN110286442B (en) | Optical fiber coupler with adjustable coupling ratio | |
| US20090220186A1 (en) | Hollow-core photonic bandgap fiber polarizer | |
| Shao et al. | Experimental demonstration of a compact variable single-mode fiber coupler based on microfiber | |
| CN103645541A (en) | Terahertz polarization beam splitter | |
| Huang et al. | Experimental demonstration of 2-μm on-chip two-mode division multiplexing using tapered directional coupler-based mode (de) multiplexer | |
| CN103698841A (en) | Microstructure fiber device | |
| CN208207272U (en) | A kind of high birefringence double-core photonic crystal fiber polarization beam apparatus | |
| CN102495448B (en) | Silicon-based three-dimensional superposition type fiber coupling structure | |
| CN103091771B (en) | Photonic crystal fiber directional coupler | |
| CN111694102A (en) | Device for polarization-independent coupling of optical fiber and anisotropic waveguide | |
| CN203759291U (en) | High birefringence optical fiber | |
| CN103728689A (en) | High double refraction optical fiber | |
| CN213210536U (en) | Terahertz adjustable magneto-optical wavelength selective switch | |
| CN112612080B (en) | Miniaturized broadband polarization beam splitter based on LNOI material preparation | |
| CN102866455A (en) | Large mode field optical fiber transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |