TW550401B - Optical passive device - Google Patents

Abstract

An optical passive device is disclosed, which comprises a collimator and a reflective unit. The collimator is provided to collimate an optical signal, and has a light source input terminal and at least a light source output terminal, wherein the light source input terminal receives the optical signal, and the light source output terminal outputs the optical signal. The reflective unit has a first reflective surface and a second reflective surface, and at least one part of the optical signal is reflected by the first reflective surface and the second reflective surface to the light source output terminal.

Description

550401

[Field of the Invention] Others can be separately made) and adjustable filtering settings. The present invention relates to an optical passive device, specifically an optical switch, an optical passive device used by a WDM & DWDM (Tunable Filter) [Known Technology] Please refer to FIG. 1, which is a conventional one-to-many One or more of the light output elements 52 are disposed on an optical switch 5, and the light input element 51 transmits the optical signal transmitted by it: the arc-shaped seat 53 element 52. In addition, it uses one Driving device wide = These light outputs are used to rotate the light input element 5 丨 located in the center, so that the complex v enters the motor and is aligned with the piece 52. However, this optical switch requires; The X, Y, and Z non-positional lifting of the driving device = the tolerance variation of the two angular directions of the driving device must be very small, the accuracy of alignment between ° ^ θχ ^ 9y. Such driving devices usually take; :: system, which is likely to cause an increase in insertion loss (all rounds), the same two easy to ask the stomach, and its adjustment during production. In addition, please refer to Figure 2, which is a conventional subtraction TΓ; 61. The first lens 62 and the second lens 6 are symmetrically disposed on the wave filter 6 3. A pair of optical fibers on the side of the first lens 62, a group 64, and a second lens 63-65. The chirped wave filter 61 is a narrowband chirped wave device (narrwband = iter). The first lens 63 is a GRIN lens

550401 V. Description of the invention (2) ------), the dual optical fiber module 64 has a first optical fiber 641 and a second optical first fiber 641 as the input end of a multi-wavelength optical signal 60, the first The two-fiber 642 series serves as a first output end; the single-fiber module 65 has _ = fiber 651, which serves as a second output end. Le Eryou in the demultiplexer 6, the multi-wavelength optical signal 60 will pass through the 641, the first lens 62, the first lens 62 collimates the multi-wavelength optical signal 60 to the filter 61, and the filter 61 will transmit more One u long light signal 601 in the wavelength light signal 60 and reflects a second wavelength light signal 602, so the long light signal 601 will be collimated into the third optical fiber 651 via the second lens 63 / (second Output end), and the second wavelength light signal 602 is incident on the second optical fiber 642 (first output end) through the collimation of the first lens 62. The conventional demultiplexer 6 includes a gradual change > variable refractive index lens. However, such lenses are expensive and expensive, and the demultiplexer has too many degrees of freedom to consider adjustment and is too complicated to assemble It is also not conducive to industrial applications. The adjustable filter line can be used to select a specific wavelength (or frequency). Its function is to select a light source signal with a special frequency from the input light source signals of different frequencies. The selection principle is based on interference effects. As shown in FIG. 3, the conventional tunable filter 7 forms a Bragg fiber grating (FBG) 76 on the optical fiber 72. It uses a phase mask 71 (Phase Mask) to make a pattern of 1 wavelength and is juxtaposed. The phase mask 71 is irradiated on the optical fiber 72 with an ultraviolet beam 73. When the input light source signal 7 4 passes, the refractive index of the optical fiber 7 2 changes, and the light source signal 75 of a specific wavelength passes through this section of the optical fiber 7 2 and reflects back. Since it is necessary to use an additional UV beam 7 3 to form a Bragg fiber grating β on the optical fiber 7 2,

550401 V. Description of the invention (3) The difficulty of adjustment during use also increases the cost. [Summary of the Invention] The purpose of Ming Tian is to provide an optical passive device for optical switches. It is another object of the present invention to provide an optical passive device for σ, wave multiplexer. , "Early, and as another objective of the present invention, it also hurts # μ & optical passive device used in the mode filter ^ Zhenggu Yi, and as a straightener: the optical passive device provided by the present invention includes- Into parallel light, and transform the parallel light phase light source signal into a reflective surface and-second; emitter. The radiating unit includes a first terminal that reflects the source signal of the light source 1 into the output surface, and it is reflected at a fixed angle; :: Jin because the reflection unit contains two reflected light source signals Angle 2 ^ —2 Therefore, the input light source signal and input and alignment become fixed angles. This will make the device's positioning triangle ^^ ,,, Fenyi, and the reflection unit can also have a fixed angle Inventor-Institution. The actuating mechanism of hibiscus = the state of light ’s passive device further includes-actuation. The vertical axis of the light 2 j 2 is: a movable seat, which is incident along the collimator into the first ~. When the actuating mechanism moves within a certain range, the position of the light will also vary with the position of 2 :, and its corresponding wheel will be changed, so that it can be used as an optical switch. Page 6 550401 V. Description of the invention (4) " ------ = Another embodiment of the invention, the optical passive device further includes a filter layer. ~ /, The layer can be a filter layer that penetrates or reflects a specific light wave band, and is attached or plated on the side of the collimator near the reflection unit to replace the original reflection surface ', so as to light source of a specific wavelength The signal is separated from the light source signals of other wavelengths, so it can be used as a demultiplexer. The above filter layer can be attached or plated on one side of the reflection unit to replace the original reflection surface, and the above-mentioned actuating mechanism can drive the reflection unit to make it rotate; the input light is transmitted to In the reflection unit, the light source signals of a specific wavelength are separated from the other light source signals through a filter layer. By rotating the reflecting unit with an actuating mechanism, the filter layer on the first reflecting surface can separate optical signals of different wavelengths, so that it can be used as an adjustable filter. [Detailed description of the preferred embodiment] An optical passive device according to a preferred embodiment of the present invention will be described below with reference to related drawings. The same components will be indicated by the same reference symbols. Referring to FIG. 4, in this embodiment, the optical passive device 1 includes a collimator 11 and a reflection unit 12. Among them, the collimator 11 collimates an optical signal, and is provided with a light source input terminal 13 and at least one light source output terminal 14, wherein the light source input terminal 13 receives light 5 hole number 'and the light source output terminal 14 outputs an optical signal. The light source input terminal 13 and the light source output terminal 14 may be optical fibers; the reflection unit 12 may include a first reflection surface 15 and a second reflection surface 16, and at least a part of the optical signal passes through the first reflection surface 1 5 And the second reflecting surface 16 is reflected to the light source output terminal 14. The first reflecting surface 15 and the second reflecting surface 16 can be fixed on one side.

550401 Fifth, the description of the invention (5) The methods are connected, with a fixed angle 0 between them, where 0 can be 0 to 90 degrees. It can be known from the basic optical principle that when the first reflection surface 15 and the second reflection surface 16 of the reflection unit 12 form a fixed angle, the angle between the incident light source signal and the reflection unit 12 is reflected. The angle Θ i of the output light source signal is also Keep a fixed value. It should be noted that the reflection unit 12 may also be 稜鏡 17. The relationship between the angle 0 of 稜鏡 17 and the angle 0! Of incident and reflected light can be obtained from Snell's law. The angle between the incident light source signal and the output light source signal reflected by 稜鏡 17 maintains a fixed value. Even if the position of 稜鏡 17 is displaced, the light source signal can still be aligned with the collimator 11. The following will further explain how the present invention can be used as an optical switch, a demultiplexer (WDM & DWDM), and a tunable filter (Tunable Fi Iter) according to FIG. 5 to FIG. 7. Optical switch Please refer to FIG. 5 In the embodiment of the present invention, the optical passive device 丨 includes a collimator 21, a reflection unit 22, and a cooperating mechanism 28. Among them, the functions and features of the collimator and the reflection unit 22 are the same as those of the above-mentioned collimator 丨丨 is the same as the reflection unit 12, of course, the reflection unit 22 can also be a 稜鏡 丨. In this embodiment, the 'first reflecting surface 25 and the second reflecting surface 26 are both crying faces. The actuating mechanism 28 includes a movable mount 29 that moves in a vertical direction along the quasi-axis. When the movable seat 29 is at the position of the fixed light j, the light is 23, and the first reflecting surface 25, the light 27 and the output light 24 and 24 ′ generated by the first and second light sources will be driven by the first light source output terminal. 27 'shot. With this feature, light is " achieved the purpose of switching channels to form a 1-to-many optical switch

Page 8 550401 V. Description of Invention (6) Off. Demultiplexer (DWDM) Please refer to FIG. 6. In another embodiment of the present invention, the optical passive device j includes a collimator 31, a reflection unit 32, a concerted action mechanism 38, and a tear wave layer 39. The functions and features of the collimator 31 and the reflection unit 32 are the same as those of the collimator 11 and the reflection unit 12 described above. Of course, the reflection unit 32 can also be a 17 '. In this embodiment, both the first reflecting surface 35 and the second reflecting surface 36 are a total reflecting surface. The filter layer 39 is attached to or on the side of the collimator 31 near the reflection unit 32. As shown in FIG. 6, one of the multi-wavelength optical signals (\ ~ n) received by the first light source input terminal 3 7 a passes through the collimator 31 and enters the filter layer 39. The filter layer 39 can transmit a wavelength of λ i The multi-wavelength optical signal 33b of the first wavelength light signal 3 3 a with a reflection wavelength of 12 ~ 1 is output to the collimator 31 and output by the first light source output terminal 37b. The first wavelength light signal 33a passes through the filter layer 39, enters the reflection unit 32, and is reflected to the filter layer 39. The first wavelength light signal 33a is transmitted through the filter layer 39 again, and is output by the second light source output terminal 37c through the collimator 31. The wavelength received by the first light source input terminal 37d is: 12 ~; The multi-wavelength optical signal 33b of ln can be incident on the filter layer 39 'through another collimator 31'. The filter layer 39 'is capable of transmitting a second-wavelength optical signal 33c having a wavelength of λ2 and reflecting a multi-wavelength optical signal 33d having a wavelength of 13 to 13; The multi-wavelength optical signal 33d is output from the first light source output terminal 37e through the collimator 31 '. The second wavelength light signal 33c enters the reflection unit 32, (the first reflection surface 35, and the second reflection surface 36 '), and is reflected to the filter layer 39 ,. Filter layer 39, again transmitting the first

550401 V. Description of the invention (7) The two-wavelength light signal 33c to the collimator 31 is output by the second light source output terminal 37f to achieve the function of the component wave multiplexer. It should be noted that the filter and wave layer can also be designed to reflect the first wavelength optical signal with a wavelength of 1 and transmit the wavelength of 12 ~; multi-wavelength optical signals of ln can also achieve the same function. . Tunable Filter Please refer to FIG. 7. According to yet another embodiment of the present invention, an optical passive device includes a collimator 41, a reflection unit 42, a uniform motion mechanism 48, and a filter layer 49. The functions and features of the collimator 41 and the reflection unit 42 are the same as those of the collimator 11 and the reflection unit 12 described above. Of course, the reflection unit 42 may also be a prism 47. In this embodiment, the first reflection surface 45 is a high-transmittance lens, and the second reflection surface 46 is a total reflection surface. The filter and wave layer 4 9 of the optical passive device 4 are attached or clocked on the first reflecting surface 45 to separate the light source signals of a specific wavelength and i from the light source signals of other wavelengths. The actuating mechanism 48 is used to provide a power to rotate the reflection unit 42. The actuating mechanism 48 includes a pivot 40, and the reflecting unit 42 performs a rotating operation according to the pivot 40. In this embodiment, when the incident light is incident on the first reflecting surface 45, the angle between the incident light and the normal of the first reflecting surface 45 is 02. The filter layer 49 in the reflection unit 42 transmits light of wavelength; and reflects light of the remaining wavelength. The wavelength i of the light transmitted by the filter layer 49 is related to the angle Θ2, that is, the wavelength of the light transmitted by the filter layer 49 can be controlled by the angle Θ2. Similarly, the filter layer 49 can also be designed to reflect light with a wavelength of λ and transmit light of the remaining wavelength. In this way, the light of the wavelength Ai will be received by the output terminal 44. When the reflection unit 42 is based on

Page 10 550401 V. Description of the invention (8) Pivot 4 Q performs a rotational transformation to reach a certain angle of the specific wavelength of the real reflection unit 4 2. The light required for this specific rotation is described above. The function of the adjustable filter connected to the output terminals 4 4 during the attached rotation. In the embodiment, the light of the 'reflection unit 42' of the incident light (; ^ ~ λη) passes through the light source signal. When the actuating mechanism 48 rotates the filtering angle of the filtering layer 49 of the reflecting unit 42 and changes. In this way, the tunable filtering can be achieved by the wavelength ′, for example, rather than being a restrictive category, and equivalent repairs to it are in the scope of patent application. The wavelength of the evening light is also changed through the collimator 41. The wavelength of the light emitted by the reflection unit 42 filtered out by the filter layer 49 and the special wavelength will be separated by controlling the angle of Θ 2. . Any changes or changes that have not deviated from this development shall be included

Page 11 550401 Brief description of the drawings [Simplified description of the drawings] Figure 1 is a schematic illustration of a conventional optical switch. FIG. 2 is a schematic explanatory diagram of a conventional demultiplexer. FIG. 3 is a schematic explanatory diagram of a conventional tunable filter. FIG. 4 is a schematic structural diagram of an optical passive device of the present invention. FIG. 5 is a schematic configuration diagram of an optical switch according to the present invention. FIG. 6 is a schematic structural diagram of a demultiplexer of the present invention. FIG. 7 is a schematic structural diagram of a tunable filter of the present invention. [Illustration of Symbols]

Page 12 1 Optical passive device 11 Collimator 12 Reflecting unit 13 Light source input terminal 14 Light source m Out terminal 15 First reflecting surface 16 Second reflecting surface 17, 17 ', 17' 'Prism 21 Collimator 22 Reflecting unit 23 Incident light 24 '24, outgoing light 25 first reflecting surface 26 second reflecting surface 550401

Brief description of drawings on page 13 27 First light source output terminal 27 'Second light source output terminal 28 Actuating mechanism 29 Possible. Mobile base 3 31, collimator 32 ^ 32' reflection unit 33 multi-wavelength optical signal ( 1 ~ λ 33a first wavelength light signal (and 1 33b multi-wavelength light signal (and 2 ~ Λ 33c second wavelength light signal (into 2 33d multi-wavelength light signal (into 3 ~ λ 35 ^ 35 'first reflecting surface 36 > 36, second reflecting surface 37a first light source input terminal 37b first light source output terminal 37c second light source output terminal 37d first light source input terminal 37e first light source output terminal 37f second light source output terminal 38 actuating mechanism 39 ^ 39, filter layer 40 pivot 41 collimator 42 reflection unit 550401 simple illustration 45 first reflecting surface 46 second reflecting surface 47 稜鏡 48 actuating mechanism 49 filter layer 5 optical switch 51 light input element 52 light output Element 53 semi-circular arc-shaped base 6 demultiplexer 60 multi-wavelength optical signal 601 first wavelength optical signal 602 second wavelength Optical signal 61 Filter 62 First lens 63 Second lens 64 Dual fiber module 641 First fiber 642 Second fiber 65 Single fiber module 651 Third fiber 7 Bragg fiber grating 71 Phase mask 72 Fiber

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550401 Brief description of diagrams 73 7 4 75 UV beam Light source signal Light source signal __ιι page 15

Claims (1)

550401 i • An optical passive device comprising: a collimator, which collimates an optical signal, and is provided with a light source input terminal and at least one light source output terminal, wherein the light source input terminal receives the light λ number 'light source output The terminal outputs the optical signal; and the reflection unit has a first reflective surface and a second reflective surface, and at least a part of the optical signal is reflected to the light source through the first reflective surface and the second reflective surface Output terminal. 2. The optical passive device as described in item 1 of the scope of patent application, further comprising: a uniform motion mechanism that provides a power to drive the reflection unit. 3. The optical passive device according to item 2 of the scope of the patent application, wherein the five-element actuating mechanism moves the reflection unit in a direction perpendicular to the optical axis of the collimator. 4. The light passive device as described in item 2 of the Shenjing patent scope, wherein the actuating mechanism makes the reflecting unit rotate. 5 · The optical passive device described in item 1 of the patent application scope, further comprising: a filtering unit for separating optical signals of different wavelengths in the optical signal 0 6 · The optical passive device described in item 5 of the patent application scope Device, wherein the filtering unit is a penetrating band-pass filtering layer. / Page 16 550401 6. Scope of patent application 7. The optical passive device described in item 5 of the scope of patent application, wherein the filter unit is a reflective bandpass filter layer. 8. The light-passive device according to any one of items 5 to 7 in the scope of patent application, wherein the filter unit is disposed on the side of the collimator near the reflection unit 9. If the scope of patent application is 5 The optical passive device according to any one of clauses 7 to 7, wherein the filtering unit is disposed on the first reflecting surface. 10. The optical passive device according to any one of items 5 to 7 of the scope of patent application, wherein the filter unit is disposed between the collimator and the reflection unit. 11. The optical passive device according to item 5 of the scope of patent application, wherein the filtering unit is a filtering layer, which is attached or plated on the first reflecting surface of the reflecting unit. 1 2. The light passive device according to item 1 of the scope of patent application, wherein the first reflecting surface and the second reflecting surface are connected at a fixed angle and fixed at one side. Page 17 550401 VI. Patent application scope 1 3. The optical passive device according to item 1 of the patent application scope, wherein the first reflecting surface and the second reflecting surface are total reflecting surfaces. 14. The light-passive device according to item 1 of the scope of patent application, wherein the first reflecting surface is a high-transmittance lens. 15. The light passive device according to item 14 of the scope of patent application, wherein the second reflecting surface is a total reflecting surface. 16. The optical passive device according to item 1 of the scope of patent application, wherein the reflection unit is a beam, and at least a part of the optical signal is reflected by the prism to the light source output terminal. 1 7. The optical passive device according to item 1 of the scope of patent application, wherein the reflecting unit includes two reflecting mirrors. Page 18