KR-20260064498-A - WAVELENGTH DIVISION DEVICE AND WAVELENGTH DIVISION DEVICE MANUFACTURING METHOD CAPABLE OF IMPROVING FILTER ALIGNMENT ACCURACY

Abstract

A wavelength division device comprises a substrate having one or more grooves, a plurality of filter bars disposed within one or more grooves of the substrate, and a prism disposed on the substrate. Each of the filter bars corresponds to an optical filtering wavelength. The prism is used to coat the plurality of filter bars. The surface of the substrate is etched to form one or more grooves. After the plurality of filter bars are coated, the plurality of filter bars are bonded within one or more grooves of the substrate. A resin disposed on the substrate is imprinted by a working die to form the prism.

Inventors

• 궈 한-이
• 뤼 인-둥
• 훙 ??-펑
• 우 스-런

Assignees

• 하이맥스 테크놀로지스 리미티드

Dates

Publication Date

20260507

Application Date

20250826

Priority Date

20241030

Claims (20)

1. As a wavelength division device, A substrate having one or more grooves; A plurality of filter bars disposed within one or more grooves of the substrate - each of the plurality of filter bars corresponds to an optical filtering wavelength -; and A prism disposed on the above substrate and configured to cover the plurality of filter bars Includes, A wavelength division device, wherein the surface of the substrate is etched to form one or more grooves, and after the plurality of filter bars are coated, the plurality of filter bars are bonded within the one or more grooves of the substrate, and a resin disposed on the substrate is imprinted by a working mold to form the prism.
2. In paragraph 1, A wavelength division device in which one or more of the above grooves have substantially the same depth and substantially the same width, and the substrate is a glass wafer.
3. In paragraph 1, A wavelength division device in which the plurality of filter bars are coated on their surfaces by different glass-coating liquid materials, and the plurality of filter bars are bonded into one or more grooves of the substrate by using an adhesive material having a refractive index that matches the glass.
4. In paragraph 1, A wavelength division device, wherein after the plurality of filter bars are bonded within the one or more grooves of the substrate, the substrate is processed by a thermal curing process for heating an adhesive material between the plurality of filter bars and the one or more grooves, or by an ultraviolet (UV) photocuring process for converting the adhesive material from a liquid state to a cured state.
5. In paragraph 1, A wavelength division device, wherein the above-described working mold comprises a predetermined pattern corresponding to the prism, the working mold is pressed against the resin with a controlled force for a certain period of time to form the prism, and after the period has elapsed, the working mold is removed from the substrate.
6. In paragraph 1, The above substrate is a wavelength division device that has been sawed to adjust the size of the wavelength division device.
7. In paragraph 1, The above wavelength division device is a wavelength division multiplexer, and the prism is, A first surface configured to receive a plurality of optical signals having a plurality of optical wavelengths; A second surface disposed adjacent to the first surface and configured to reflect the plurality of light signals to generate the plurality of reflected light signals; and A third surface disposed adjacent to the first surface and the second surface and configured to receive the plurality of reflected light signals A wavelength division device comprising
8. In Paragraph 7, A wavelength division device in which the plurality of reflected light signals are received by the plurality of filter bars through the third surface of the prism, and the plurality of reflected light signals are multiplexed by the substrate to generate a composite light signal.
9. In paragraph 1, The above wavelength division device is a wavelength division demultiplexer, and the prism is, A first surface configured to output a plurality of reflected light signals; A second surface disposed adjacent to the first surface and configured to reflect a plurality of filtered light signals to generate the plurality of reflected light signals; and A third surface disposed adjacent to the first surface and the second surface and configured to receive the plurality of filtered optical signals A wavelength division device comprising
10. In Paragraph 9, A wavelength division device in which a composite optical signal is demultiplexed and filtered by the substrate and the plurality of filter bars to generate the above plurality of filtered optical signals.
11. As a method for manufacturing a wavelength division device, A step of etching the surface of a substrate to form one or more grooves; A step of coating multiple filter bars; After the plurality of filter bars are coated, a step of bonding the plurality of filter bars into the one or more grooves of the substrate; and A step of imprinting a resin placed on the substrate by a working mold to form a prism. Includes, A method for manufacturing a wavelength division device, wherein each of the plurality of filter bars corresponds to an optical filtering wavelength, and the prism is disposed on the substrate and configured to cover the plurality of filter bars.
12. In Paragraph 11, A method for manufacturing a wavelength division device, wherein one or more of the above grooves have substantially the same depth and substantially the same width, and the substrate is a glass wafer.
13. In Paragraph 11, A method for manufacturing a wavelength division device, wherein the step of coating the plurality of filter bars is a step of coating the surface of the plurality of filter bars with a different glass coating liquid material, and the step of bonding the plurality of filter bars into one or more grooves of the substrate is a step of bonding the plurality of filter bars into one or more grooves of the substrate by using an adhesive material having a refractive index that matches the glass.
14. In Paragraph 11, A method for manufacturing a wavelength division device, further comprising the step of processing a thermal curing process for heating an adhesive material between the plurality of filter bars and the one or more grooves, or processing by an ultraviolet (UV) photocuring process for converting the adhesive material from a liquid state to a cured state after the plurality of filter bars are bonded within the one or more grooves of the substrate.
15. In Paragraph 11, The step of imprinting a resin placed on the substrate by a working mold to form the above prism is, A step of applying pressure to the resin by the working mold with a controlled force for a certain period of time to form the prism; and After the above period has elapsed, the step of removing the work mold from the substrate. Includes, A method for manufacturing a wavelength division device, wherein the above-described working mold includes a predetermined pattern corresponding to the prism.
16. In Paragraph 11, The above method for manufacturing a wavelength division device further includes the step of sawing the substrate to adjust the size of the wavelength division device, and A method for manufacturing a wavelength division device, wherein the substrate, the plurality of filter bars, and the prism form the wavelength division device.
17. In Paragraph 16, The above wavelength division device is a wavelength division multiplexer, and the prism is, A first surface configured to receive a plurality of optical signals having a plurality of optical wavelengths; A second surface disposed adjacent to the first surface and configured to reflect the plurality of light signals to generate the plurality of reflected light signals; and A third surface disposed adjacent to the first surface and the second surface and configured to receive the plurality of reflected light signals A method for manufacturing a wavelength division device comprising
18. In Paragraph 17, A method for manufacturing a wavelength division device, wherein the plurality of reflected light signals are received by the plurality of filter bars through the third surface of the prism, and the plurality of reflected light signals are multiplexed by the substrate to generate a composite light signal.
19. In Paragraph 16, The above wavelength division device is a wavelength division demultiplexer, and the prism is, A first surface configured to output a plurality of reflected light signals; A second surface disposed adjacent to the first surface and configured to reflect a plurality of filtered light signals to generate the plurality of reflected light signals; and A third surface disposed adjacent to the first surface and the second surface and configured to receive the plurality of filtered optical signals A method for manufacturing a wavelength division device comprising
20. In Paragraph 19, A method for manufacturing a wavelength division device in which a composite optical signal is demultiplexed and filtered by the substrate and the plurality of filter bars to generate the above plurality of filtered optical signals.

Description

Wavelength Division Device Capable of Improving Filter Alignment Accuracy and Method of Manufacturing a Wavelength Division Device The present invention illustrates a wavelength division device and a method for manufacturing a wavelength division device, and more specifically, a wavelength division device and a method for manufacturing a wavelength division device that can improve filter alignment accuracy and reduce the bonding alignment process. Wavelength Division Multiplexing (WDM) is a technology that utilizes multiple lasers to simultaneously transmit multiple beams of different wavelengths over a single optical fiber. WDM can be used to transmit each beam separately or to combine beams of several wavelengths of light and transmit them together. Local Area Network WDM (LWDM) is a wavelength division multiplexing technology based on Ethernet channels. It utilizes 12 wavelengths ranging from 1269 nm to 1332 nm within the O-band (1260 nm to 1360 nm), with a wavelength spacing of 4 nm. The operating wavelengths of LWDM are characterized by low dispersion and good stability. At the same time, LWDM can increase channel capacity and also save on optical fiber usage. Traditional multiplexer and demultiplexer concepts utilize parallelogram structures and filters to combine optical beams of different wavelengths and transmit them through optical fibers. Filters are assembled by bonding. An alternative method is to use lift-off technology in the filter coating process. However, based on the four channels of LWDM, achieving the desired coating process and quality is very difficult when the lift-off process is used. In an embodiment of the present invention, a wavelength division device is disclosed. The wavelength division device comprises a substrate having one or more grooves, a plurality of filter bars disposed within one or more grooves of the substrate, and a prism disposed on the substrate. Each of the filter bars corresponds to an optical filtering wavelength. The prism is configured to cover the plurality of filter bars. The surface of the substrate is etched to form one or more grooves. After the plurality of filter bars are coated, the plurality of filter bars are bonded within one or more grooves of the substrate. A resin disposed on the substrate is imprinted by a working mold to form the prism. In another embodiment of the present invention, a method for manufacturing a wavelength division device is disclosed. The method for manufacturing a wavelength division device includes the steps of etching the surface of a substrate to form one or more grooves, coating a plurality of filter bars, bonding a plurality of filter bars into one or more grooves of the substrate after the plurality of filter bars are coated, and imprinting a resin placed on the substrate by a working die to form a prism. Each of the filter bars corresponds to an optical filtering wavelength. A prism is placed on the substrate and configured to cover a plurality of filter bars. These and other objects of the present invention will undoubtedly become apparent to those skilled in the art after reading the following detailed description of preferred embodiments illustrated in the various drawings and figures. Figure 1 is a structure of a wavelength division device according to an embodiment of the present invention. FIG. 2 illustrates a first stage for manufacturing the wavelength division device in FIG. 1. FIG. 3 illustrates a second stage for manufacturing the wavelength division device in FIG. 1. FIG. 4 illustrates a third stage for manufacturing the wavelength division device in FIG. 1. FIG. 5 illustrates a fourth stage for manufacturing the wavelength division device in FIG. 1. FIG. 6 illustrates a fifth stage for manufacturing the wavelength division device in FIG. 1. FIG. 7 illustrates a sixth stage for manufacturing the wavelength division device in FIG. 1. FIG. 8 illustrates an optical path that performs a multiplexing mechanism by the wavelength splitting device in FIG. 1. FIG. 9 illustrates an optical path that performs a demultiplexing mechanism by the wavelength splitting device in FIG. 1. FIG. 10 illustrates the coating technique of the substrate of the wavelength division device in FIG. 1 when the multiplexing mechanism is performed. FIG. 11 illustrates the coating technique of the substrate of the wavelength division device in FIG. 1 when the demultiplexing mechanism is performed. FIG. 12 is a flowchart for manufacturing the wavelength division device in FIG. 1. FIG. 1 is a structure of a wavelength division device (100) according to an embodiment of the present invention. The wavelength division device (100) may be a wavelength division multiplexer or a wavelength division demultiplexer, which allows a plurality of optical signals having different wavelengths to be transmitted simultaneously on a single optical fiber. A wavelength splitting device (100) comprises a substrate (10), a plurality of filter bars (FB1 to FB4),