CN211348713U - High-isolation low-loss coarse wavelength division multiplexer - Google Patents
High-isolation low-loss coarse wavelength division multiplexer Download PDFInfo
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- CN211348713U CN211348713U CN201922128529.2U CN201922128529U CN211348713U CN 211348713 U CN211348713 U CN 211348713U CN 201922128529 U CN201922128529 U CN 201922128529U CN 211348713 U CN211348713 U CN 211348713U
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Abstract
The utility model discloses a high isolation low-loss coarse wavelength division multiplexer belongs to the fiber communication field, including incident collimator, reflection collimator, wavelength division multiplexing diaphragm and transmission collimator, between fixed incident collimator of wavelength division multiplexing diaphragm, reflection collimator and the transmission collimator, mix the GeO2Incident optical fiber and GeO-doped optical fiber2The reflection optical fiber is respectively connected to the incident collimator, the reflection collimator and the doped GeO2The transmission optical fiber is connected into the transmission collimator, and the side surface of the wavelength division multiplexing membrane far away from the incident collimator and the reflection collimator is fixed with a high transmission isolation film.The beneficial effects of the utility model reside in that: the incident optical fiber, the reflecting optical fiber and the transmitting optical fiber are doped with materials forming low-loss optical waveguide, and a high-transmission isolation film is fixed on the side surface of the wavelength division multiplexing diaphragm far away from the incident collimator and the reflecting collimator to improve isolation.
Description
Technical Field
The utility model relates to an optical fiber communication technology field especially indicates a high isolation low loss coarse wavelength division multiplexer.
Background
The use of fiber optic communication and fiber optic sensing is becoming more common, thereby increasing the demand for various optical devices in fiber optic communication systems and fiber optic sensing systems. The optical wavelength division multiplexing (WDM for short) technology multiplexes optical modulation signals of different optical wavelengths into one optical fiber according to the optical wavelengths for transmission, and also decomposes multi-wavelength optical modulation signals simultaneously transmitted in the same optical fiber into individual wavelengths for respective output, which is one of the most effective schemes for improving the optical fiber communication capacity, and thus is widely applied to the current optical communication network.
There is an urgent need for a wavelength division multiplexer with high isolation and low loss.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high isolation low-loss coarse wavelength division multiplexer has high isolation and low-loss characteristics.
The technical scheme of the utility model is realized like this:
a high-isolation low-loss coarse wavelength division multiplexer comprises an incident collimator, a reflection collimator, a wavelength division multiplexing membrane and a transmission collimator, wherein the wavelength division multiplexing membrane is fixed among the incident collimator, the reflection collimator and the transmission collimator and doped with GeO2Incident optical fiber and GeO-doped optical fiber2The reflection optical fiber is respectively connected with the incident collimator, the reflection collimator and the doped GeO2And the transmission optical fiber is connected into the transmission collimator, and a high-transmission isolation film is fixed on the side surface of the wavelength division multiplexing membrane far away from the incident collimator and the reflection collimator.
As a preferred embodiment of the present invention, the incident collimator and the reflection collimator are single fiber collimators fixed on the same side of the wavelength division multiplexing diaphragm, and the high transmission isolation film is fixed on the other side of the wavelength division multiplexing diaphragm.
As a preferred embodiment of the present invention, the optical fiber module further comprises an isolation diaphragm, wherein the isolation diaphragm is fixed between the reflection collimator and the wavelength division multiplexing diaphragm.
As a preferred embodiment of the present invention, the incident collimator and the reflection collimator are formed by two optical fiber collimators and fixed on one side of the wavelength division multiplexing diaphragm, and the high transmission isolation film is fixed on the other side of the wavelength division multiplexing diaphragm.
As a preferred embodiment of the present invention, the output end of the reflective collimator is further fixed with a light filter for isolating the transmitted light.
As a preferred embodiment of the present invention, the optical fiber bundle further comprises a housing, and the incident collimator, the reflection collimator, the wavelength division multiplexing film, and the transmission collimator are fixed in the housing.
As a preferred embodiment of the present invention, the lens used in the transmission collimator is a C-lens or a G-lens.
The beneficial effects of the utility model reside in that: the incident optical fiber, the reflecting optical fiber and the transmitting optical fiber are doped with materials forming low-loss optical waveguide, and a high-transmission isolation film is fixed on the side surface of the wavelength division multiplexing diaphragm far away from the incident collimator and the reflecting collimator to improve isolation.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of the high-isolation low-loss coarse wavelength division multiplexer of the present invention.
In the figure, 1-incident collimator; 2-a reflective collimator; 3-wavelength division multiplexing membrane; 4-a transmissive collimator; 5-high transmission barrier film.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in figure 1, the utility model provides a high isolation low-loss thick wavelength division multiplexer, including incident collimator 1, reflection collimator 2, wavelength division multiplexing diaphragm 3 and transmission collimator 4, between fixed incident collimator 1 of wavelength division multiplexing diaphragm 3, reflection collimator 2 and transmission collimator 4, mix the GeO2Incident optical fiber and GeO-doped optical fiber2The reflection optical fibers are respectively connected into an incident collimator 1 and a reflection collimator 2, and are doped with GeO2The transmission optical fiber is connected to a transmission collimator 4, and a high transmission isolation film 5 is fixed on the side surface of the wavelength division multiplexing diaphragm 3 far away from the incident collimator 1 and the reflection collimator 2. Doped GeO2Input an incident beam of GeO-doped optical fiber2The reflection fiber outputs a reflected beam doped with GeO2The transmission fiber outputs a transmission beam. The high-transmission isolation film 5 is fixed on the wavelength division multiplexing membrane 3, so that the isolation is improved. In other embodiments, P can be doped in the incident optical fiber, the reflecting optical fiber and the transmitting optical fiber2O5And the optical fiber is used for reducing the loss of the incident optical fiber, the reflecting optical fiber and the transmitting optical fiber.
As a preferred embodiment of the present invention, the incident collimator 1 and the reflection collimator 2 are single fiber collimators and fixed on the same side of the wavelength division multiplexing diaphragm 3, and the high transmission isolation film 5 is fixed on the other side of the wavelength division multiplexing diaphragm 3. An included angle is arranged between the incident collimator 1 and the reflection collimator 2, and the included angle is determined according to the reflection angle of the reflected light beam.
As a preferred embodiment of the present invention, the present invention further comprises an isolation diaphragm, and the isolation diaphragm is fixed between the reflection collimator 2 and the wavelength division multiplexing diaphragm 3. The light beam reflected by the wavelength division multiplexing diaphragm 3 enters the reflection collimator 2 after passing through the isolation diaphragm, and the isolation diaphragm also serves to improve isolation.
As a preferred embodiment of the present invention, the incident collimator 1 and the reflection collimator 2 are formed by two optical fiber collimators and fixed on one side of the wavelength division multiplexing diaphragm 3, and the high transmission isolation film 5 is fixed on the other side of the wavelength division multiplexing diaphragm 3. And an optical filter for isolating transmitted light is fixed at the output end of the reflecting collimator 2. The optical filter is coated at the reflection end of the dual-fiber collimator by ion implantation and doped with GeO2The fiber inserting core of the reflecting fiber is inserted into the reflecting end of the double fiber collimator, so that the isolation of the wavelength division multiplexer is further improved.
As a preferred embodiment of the present invention, the present invention further comprises a housing, and the incident collimator 1, the reflection collimator 2, the wavelength division multiplexing membrane 3, and the transmission collimator 4 are fixed in the housing. The shell is internally provided with a cavity, and the incident collimator 1, the reflection collimator 2, the wavelength division multiplexing membrane 3 and the transmission collimator 4 are coaxially fixed in the cavity in the shell. Specifically, the outer shell adopts a glass tube structure.
As a preferred embodiment of the present invention, the lens used in the transmission collimator 4 is a C-lens or a G-lens.
The beneficial effects of the utility model reside in that: the incident optical fiber, the reflecting optical fiber and the transmitting optical fiber are doped with materials forming low-loss optical waveguide, and a high-transmission isolation film 5 is fixed on the side surface of the wavelength division multiplexing diaphragm 3 far away from the incident collimator 1 and the reflecting collimator 2 to improve isolation.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A high-isolation low-loss coarse wavelength division multiplexer comprises an incident collimator, a reflection collimator, a wavelength division multiplexing membrane and a transmission collimator, wherein the wavelength division multiplexing membrane is fixed among the incident collimator, the reflection collimator and the transmission collimator, and the high-isolation low-loss coarse wavelength division multiplexer is characterized in that: doped GeO2Incident optical fiber and GeO-doped optical fiber2The reflection optical fiber is respectively connected with the incident collimator, the reflection collimator and the doped GeO2And the transmission optical fiber is connected into the transmission collimator, and a high-transmission isolation film is fixed on the side surface of the wavelength division multiplexing membrane far away from the incident collimator and the reflection collimator.
2. A high isolation low loss coarse wavelength division multiplexer according to claim 1, wherein: the incident collimator and the reflection collimator are single optical fiber collimators and are fixed on the same side of the wavelength division multiplexing diaphragm, and the high-transmission isolation film is fixed on the other side surface of the wavelength division multiplexing diaphragm.
3. A high isolation low loss coarse wavelength division multiplexer according to claim 2, wherein: the wavelength division multiplexing optical fiber module further comprises an isolation diaphragm, wherein the isolation diaphragm is fixed between the reflection collimator and the wavelength division multiplexing diaphragm.
4. A high isolation low loss coarse wavelength division multiplexer according to claim 1, wherein: the incident collimator and the reflection collimator are composed of double optical fiber collimators and fixed on one side of the wavelength division multiplexing membrane, and the high transmission isolation film is fixed on the other side of the wavelength division multiplexing membrane.
5. A high isolation low loss coarse wavelength division multiplexer according to claim 2 or 4, wherein: and an optical filter for isolating transmitted light is fixed at the output end of the reflection collimator.
6. A high isolation low loss coarse wavelength division multiplexer according to claim 1, wherein: the optical fiber laser further comprises a shell, and the incident collimator, the reflection collimator, the wavelength division multiplexing membrane and the transmission collimator are fixed in the shell.
7. A high isolation low loss coarse wavelength division multiplexer according to claim 1, wherein: the lens adopted by the transmission collimator is a C-lens or a G-lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922128529.2U CN211348713U (en) | 2019-12-02 | 2019-12-02 | High-isolation low-loss coarse wavelength division multiplexer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922128529.2U CN211348713U (en) | 2019-12-02 | 2019-12-02 | High-isolation low-loss coarse wavelength division multiplexer |
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| CN211348713U true CN211348713U (en) | 2020-08-25 |
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| CN201922128529.2U Active CN211348713U (en) | 2019-12-02 | 2019-12-02 | High-isolation low-loss coarse wavelength division multiplexer |
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