TWM565873U - Wavelength splitting multiplexer and structure improvement of optical route of multiplexer - Google Patents

Abstract

The present invention provides an optical path structure of a wavelength division multiplexer, the optical path structure including a plurality of optical communication components and a total reflection 稜鏡. The total reflection 稜鏡 has a light-receiving side (or light-emitting side), a light-folding side, and a light-coupled side. The optical communication component is configured to receive or output a light beam having a first polarization state and a specific wavelength. The total reflection 稜鏡 has a polarization filter disposed at a 45-degree angle with respect to the light-receiving side and the light-returning side for reflecting a second polarization state light beam, and the light-receiving side of the total reflection 稜鏡 communicates with the light A 1/2 wave plate is disposed between the elements, and the light folding side is provided with a 1/4 wave plate and a second filter for retroreflecting a specific wavelength beam. The optical path structure of this creation can effectively utilize the limited space and integrate the most channels into a single module.

Description

Improvement of optical path structure of wavelength division multiplexer and demultiplexer

The present invention relates to an improvement of the optical path structure, in particular to an optical path structure improvement of a wavelength division multiplexer and a demultiplexer.

The multiplex communication transmission technology refers to transmitting more than two signals simultaneously in the same optical fiber, and the main purpose is to increase the transmission rate by increasing the number of channels. In view of the current optical communication products on the market, the current application of multiplex technology to optical fiber communication mainly includes TDM (time division multiplexing) and WDM (wave division multiplexing).

Among them, TDM is the main method to increase the transmission rate of fiber in the early stage. However, the technology of TDM does not fully utilize the characteristics of fiber-optic broadband, and the transmission of signals through time-sharing is limited by the cleavable interval, which will gradually face technical bottlenecks. In contrast, WDM technology has achieved breakthrough development due to the successful application of EDFA (fiber amplifier). At present, WDM technology has been able to split the 1550nm communication band into 4, 8 or even more bands for communication. The communication capacity of the root fiber is expanded from 2.5Gbps to 10G, 20G, 40G, and 100G. We call this type of WDM DWDM (High Density Wave Splitting), and DWDM will make full use of the bandwidth of the fiber to make the fiber. The first step in the successful communication of the all-optical network.

However, although WDM technology can effectively increase the bandwidth, thereby increasing the amount of information and the transmission speed, it is limited by the design of the optical path. If the number of channels is continuously increased, the optical path structure of the WDM connection must be increased. This will cause The connection of WDM is large and the number of components is missing.

The purpose of this creation is to solve the problem of the wavelength division multiplexing of the prior art, which is limited by the limitation of the optical path structure, the product mechanism is too complicated, and the overall volume of the product cannot be reduced.

To achieve the above objectives, the present invention provides an improvement in optical path structure, including a light emitter and a total reflection 稜鏡. The light emitter is configured to output a light beam having a first polarization state and a specific wavelength. The total reflection enthalpy has a light-receiving side, a light-returning side, and a light-coupled side, wherein the light-receiving side corresponds to an output direction of the light emitter, and the light-returning side is disposed on the light-coupled side. a 1/2 wave plate is disposed between the light-receiving side of the total reflection 与 and the light emitter, and the total reflection 稜鏡 corresponds to the light-receiving side and the light-returning side a polarizing filter for reflecting a beam of a second polarization state, wherein the photorefractive side is provided with a 1/4 wave plate and a filter disposed on the 1/4 wave plate for reflecting the beam of the specific wavelength, The output of the light emitter is converted into a second polarization state via the 1/2 wave plate, and is incident on the polarization filter to be reflected and reflected to the light returning side, and the light beam of the specific wavelength is reversely reflected through the filter to pass through The 1/4 wave plate is secondarily converted back to the first polarization state beam and output to the coupling side through the polarization filter.

Further, the total reflection raft includes a first cymbal and a second cymbal, and the polarization filter is coupled between the first cymbal and the second cymbal.

Further, the polarizing filter is configured to deflect the light beam of the light emitter by 90 degrees and then exit to the light folding side.

Another object of the present invention is to provide an improvement in optical path structure, It includes a light receiver and a total reflection 稜鏡. The total reflection tether has a light exit side, a light fold back side, and a light coupling side. The light-emitting side corresponds to a light-receiving direction of the light receiver, and the light-returning side is disposed at an opposite position of the light-coupled side, and the total reflection 稜鏡 corresponds to the light-emitting side and the light-returning side. a polarizing filter for reflecting a beam of a second polarization state is disposed. The photorefractive side is provided with a 1/4 wave plate and a filter disposed on the 1/4 wave plate for reflecting a beam of a specific wavelength. Between the light-emitting side of the total reflection 稜鏡 and the light receiver, a 1/2 wave plate is disposed, and the first polarization state and the light beam of the specific wavelength pass through the polarization filter when entering the light-coupled side. The sheet is incident on the light folding side, and the light beam of the specific wavelength is reversely reflected through the filter and is secondarily converted into a second polarization state light beam by a quarter wave plate, and the second polarization is reflected by the polarization filter. The state beam is directed to the light exiting side to be converted back to the first polarization state beam by a 1/2 wave plate and transmitted to the light receiver.

Further, the total reflection raft includes a first cymbal and a second cymbal, and the polarization filter is coupled between the first cymbal and the second cymbal.

Further, the polarizing filter is configured to deflect the light beam of the light emitter by 90 degrees and then exit to the light folding side.

Another object of the present invention is to provide an optical path structure improvement of a wavelength division multiplexer, comprising a first light emitter, a second light emitter, a third light emitter, and a total reflection 稜鏡. The first light emitter is configured to output a light beam having a first polarization state and a first wavelength; the second light emitter is configured to output a light beam having a first polarization state and a second wavelength; the third light emitter is configured to output the first light beam A light beam of a polarization state and a third wavelength. The total reflection enthalpy has a first light-receiving side corresponding to the first light emitter and a second light-receiving side corresponding to the second light emitter a side, a third light-receiving side of the third light emitter, and a light-coupled side, wherein the first light-receiving side and the third light-receiving side are disposed on opposite sides, The second light-receiving side and the light-receiving side are disposed on opposite sides of the first light-receiving side and the third light-receiving side, and the total reflection 具有 has a first light-receiving The side and the coupling side are disposed at a 45-degree angle to reflect a first wavelength beam and a second filter side and the third light-receiving side are disposed at a 45-degree angle to reflect the second polarization a polarizing filter of the state beam, wherein the first filter is disposed between the first light receiving side and the light coupling side to align the first light receiving side and the light coupling side to the first filter Aligning the polarization filter with the second light-receiving side and the third light-receiving side to align the second light-receiving side and the third light-receiving side to the polarization filter a 1/2 wave plate disposed between the third light receiving side of the total reflection pupil and the third light emitter on the same reflective surface, the second light receiving side and the second light emitting side A 1/4 wave plate, a second filter for retroreflecting the third wavelength beam, and a 1/4 wave plate for compensating the phase are sequentially disposed between the devices.

Further, the optical path structure improvement of the wavelength division multiplexer includes a fourth light emitter, and a third filter disposed in a coupling light direction of the light coupling side of the total reflection ,, the fourth light emission The device is configured to output a light beam having a first polarization state and a fourth wavelength, wherein the third filter is disposed at an angle of 45 degrees with respect to the fourth light emitter and the coupling light direction to reflect the light beam of the fourth wavelength.

Further, the optical path structure improvement of the wavelength division multiplexer includes an optical fiber, and a coupling lens disposed between the optical fiber and the third filter for bundling all the beams passing through the third filter To the fiber.

Further, the total reflection enthalpy includes a first cymbal and a second cymbal, and the polarization filter is coupled to the first filter and the first filter Between the second one.

Another object of the present invention is to provide an optical path structure improvement of a wavelength division demultiplexer, comprising a first optical receiver, a second optical receiver, a third optical receiver, and a total reflection 稜鏡. The first optical receiver is configured to receive a light beam having a first polarization state and a first wavelength; the second optical receiver is configured to receive a light beam having a first polarization state and a second wavelength; and the third optical receiver is configured to receive the first light beam A light beam of a polarization state and a third wavelength. The total reflection 稜鏡 has a first light exiting side corresponding to the first light receiver, a second light exiting side corresponding to the second light receiver, and a third light emitting side corresponding to the third light receiver And a light-coupled side, wherein the first light-emitting side and the third light-emitting side are disposed on opposite sides, the second light-emitting side and the light-coupled side are opposite to the first light-emitting side and the first The three light exiting sides are vertically disposed on opposite sides, and the total reflection pupil has a first filter disposed at an angle of 45 degrees with respect to the first light emitting side and the coupling side to reflect the first wavelength beam. And a polarization filter for reflecting the second polarization state light beam at an angle of 45 degrees with respect to the second light exiting side and the third light exiting side, wherein the first filter is disposed on the first light emitting side and the coupled light The first light-emitting side and the light-coupled side are aligned on the same reflective surface of the first filter, and the polarization filter is disposed between the second light-emitting side and the third light-emitting side. The second light exiting side and the third light emitting side are aligned to the same reflective surface of the polarization filter, the whole A 1/2 wave plate is disposed between the third light emitting side of the reflection 稜鏡 and the third light receiver, and a 1/4 wave plate is sequentially disposed between the second light receiving side and the second light receiver a second filter for retroreflecting the third wavelength beam and a quarter wave for compensating the phase.

Further, the optical path structure improvement of the wavelength division demultiplexer includes a fourth photoreceiver and a coupling light disposed on the coupling side of the total reflection pupil a third filter in the direction, the fourth light receiver is configured to receive a light beam having a first polarization state and a fourth wavelength, the third filter being at an angle of 45 degrees with respect to the fourth light receiver and the coupling light direction A light beam for reflecting the fourth wavelength is provided.

Further, the total reflection raft includes a first cymbal and a second cymbal, and the polarization filter and the first filter system are coupled between the first cymbal and the second cymbal.

Therefore, this creation has the following advantages compared to the prior art:

1. Through the improvement of the optical path structure, the creation can effectively reduce the volume of the multiplexer and the multiplexer as a whole, and increase the convenience of product use.

2. Through the improvement of the optical path structure, the creation can reduce the number of institutions in the product, thereby reducing the cost of product production.

100‧‧‧ Optical path structure of wavelength division multiplexer

1A‧‧‧First Light Emitter

1B‧‧‧Second light emitter

1C‧‧‧third light emitter

1D‧‧‧fourth light emitter

10‧‧‧ total reflection

10A‧‧‧First light-receiving side

10B‧‧‧second light side

10C‧‧‧ third light collection side

10D‧‧‧coupled side

11‧‧‧ first

12‧‧‧Second

A1‧‧‧first filter

B1‧‧‧Polarized filter

C1‧‧‧1/2 wave plate

D1‧‧‧1/4 wave plate

E1‧‧‧second filter

F1‧‧‧Compensation phase with 1/4 wave plate

G1‧‧‧ third filter

20‧‧‧coupled lens

30‧‧‧Fiber

200‧‧‧Wavelength division multiplexer optical path structure

4A‧‧‧First Light Receiver

4B‧‧‧Second light receiver

4C‧‧‧third light receiver

4D‧‧‧fourth optical receiver

40‧‧‧ total reflection

40A‧‧‧first light side

40B‧‧‧Second light side

40C‧‧‧ third light side

40D‧‧‧coupled side

A4‧‧‧ first filter

B4‧‧‧Polarized filter

C4‧‧‧1/2 wave plate

D4‧‧‧1/4 wave plate

E4‧‧‧second filter

F4‧‧‧Compensation phase with 1/4 wave plate

G4‧‧‧ third filter

41‧‧‧ first

42‧‧‧Second

Figure 1. Schematic diagram of the optical path structure of the present wavelength division multiplexer.

Figure 2 is a schematic diagram showing the reflection characteristics of the first filter in this creation.

Figure 3 is a schematic diagram showing the reflection characteristics of the polarization filter in the present creation.

Figure 4 is a schematic diagram showing the reflection characteristics of the second filter in the present creation.

Figure 5 is a schematic diagram showing the reflection characteristics of the third filter in the present creation.

Figure 6. Schematic diagram of the optical transmission path of the first channel of the present creation.

Figure 7. Schematic diagram of the optical transmission path of the second channel of the present creation.

Figure 8. Schematic diagram of the optical transmission path of the third channel of the present creation.

Figure 9. Schematic diagram of the optical transmission path of the fourth channel of the present creation.

FIG. 10 is a schematic diagram of the optical path structure of the present wavelength division demultiplexer.

Figure 11. Schematic diagram of the optical transmission path of the first channel of the present creation.

Figure 12 is a schematic diagram of the optical transmission path of the second channel of the present creation.

Figure 13. Schematic diagram of the optical transmission path of the third channel of the present creation.

Figure 14. Schematic diagram of the optical transmission path of the fourth channel of the present creation.

The detailed description and technical content of this creation are described below with reference to the drawings. Furthermore, the drawings in this creation are for convenience of description, and the proportions thereof are not necessarily drawn to the actual scale, and the drawings and their proportions are not intended to limit the scope of the present invention, and are described herein first.

The word "comprising" or "comprises" or "an" or "an" "One" means that the grammatical object of the object is one or more (ie, at least one).

In the following, the present invention will be further described in the detailed description and the embodiments. However, it should be understood that these embodiments are only used to facilitate the understanding of the present invention and are not intended to limit the scope of the present invention.

The optical path structure in the present application can be applied to, for example, Wavelength Division Multiplexing (WDM), Conventional/Coarse Wavelength Division Multiplexing (CWDM), and Dense Wavelength Division Multiplexing (Dense Wavelength Division Multiplexing). DWDM), Optical Add/Drop Multiplexer (OADM), Reconfigurable Optical Add/Drop Multiplexer (ROADM), or other related optical communication multiplexing technology. Beams of different wavelengths are operated by MUX and DEMUX, thereby transmitting beams of different wavelengths To single mode fiber, transmission through multiple channels.

The following is a description of the wavelength division multiplexing of the present invention. Please refer to FIG. 1 , which is a schematic diagram of the optical path structure of the wavelength division multiplexer. As shown in the figure, this embodiment reveals a wavelength division multiplexing. The optical path structure 100 includes a first light emitter 1A, a second light emitter 1B, a third light emitter 1C, a fourth light emitter 1D, a total reflection 稜鏡10, and a coupling lens. 20, and an optical fiber 30.

The first light emitter 1A is configured to output a light beam having a first polarization state and a first wavelength, and the second light emitter 1B is configured to output a light beam having a first polarization state and a second wavelength, the third light The transmitter 1C is configured to output a light beam having a first polarization state and a third wavelength, and the fourth light emitter 1D is configured to output a light beam having a first polarization state and a fourth wavelength. In a preferred embodiment, the light emitter may be a Vertical-Cavity Surface Emitting Laser (VCSEL) or an Edge Emitter (Edge Emitter). , there is no restriction in this creation.

The total reflection 稜鏡 10 has a first light-receiving side 10A corresponding to the first light emitter 1A and a second light-receiving side 10B corresponding to the second light emitter 1B in four directions. Corresponding to the third light collecting side 10C of the third light emitter 1C and a light coupling side 10D. The first light-receiving side 10A and the third light-receiving side 10C are disposed on opposite sides, and the second light-receiving side 10B and the light-coupled side 10D are opposite to the first light-receiving side 10A and The third light collecting side 10C is vertically disposed on opposite sides.

The total reflection dome 10 has a first light-receiving side 10A and The light coupling side 10D is provided with a first filter A1 for reflecting the first wavelength beam at a 45 degree angle and a reflection angle of 45 degrees with respect to the second light collection side 10B and the third light collection side 10C. A polarization filter B1 of a two-polarized state beam. In a preferred embodiment, the total reflection 稜鏡 10 is a 稜鏡 block composed of two pairs of right-angled triangles ,, and the total reflection 稜鏡 10 includes a first 稜鏡 11 and a first In the second step 12, the polarization filter B1 and the first filter A1 are plated on the inclined joint surface between the first weir 11 and the second weir 12. In the present embodiment, the first polarization state refers to a case where the polarization mode of the light beam is a longitudinal wave (P wave), and the second polarization state refers to a case where the polarization mode of the light beam is a transverse wave (S wave). Similarly, it can be proved that the same optical path structure can be configured by the opposite polarization mode.

The first filter A1 is disposed between the first light-receiving side 10A and the light-coupled side 10D to align the first light-receiving side 10A and the light-coupled side 10D to the same reflection of the first filter A1. On the surface. The polarization filter B1 is disposed between the second light-receiving side 10B and the third light-receiving side 10C to align the second light-receiving side 10B and the third light-receiving side 10C to the polarization filter. The same reflective surface of B1. The arrangement on the same reflective surface as used herein means that the positions where the two are located are mutually corresponding to the incident and exiting on the reflection plane (the side opposite to the opposite direction).

A 1/2 wave plate C1 is disposed between the third light collecting side 10C of the total reflection 稜鏡 10 and the third light emitter 1C, and the light beam passing through the 1/2 wave plate C1 is delayed by a phase angle of 2θ. For example, if the incident beam is a longitudinal wave (P wave), it will be output as a transverse wave (S wave). Similarly, when the incident beam is a transverse wave (S wave), it will be output as a longitudinal wave (P wave). A second quarter wave plate D1, a second filter E1 for back reflecting the third wavelength light beam, and a compensation phase are disposed between the second light receiving side 10B and the second light emitter 1B. 1/4 wave plate F1. The 1/4 wave plate D1 and the compensation phase are 1/4 wave plate F1 The combination happens to make the passing beam (the second wavelength beam) pass through and then deflect back to the same phase, so that the passing beam and the output beam exhibit the same polarization state (S wave output is S wave, P wave output is P wave) .

A third filter G1 is disposed in the coupling direction of the coupling side 10D of the total reflection 稜鏡10, and the third filter G1 is disposed at an angle of 45 degrees with respect to the fourth light emitter 1D and the coupling light direction. The light beam for reflecting the fourth wavelength is used to deflect the output beam of the fourth light emitter 1D by 90 degrees and then output parallel to the other light beams in the coupling light direction toward the coupling light direction. After passing through the coupling lens 20, the plurality of parallel beams outputted toward the coupling light direction bundle all the beams passing through the third filter G1 to the optical fiber 30.

The following is a description of the characteristics of each filter and polarization filter in this creation, so as to facilitate the description of the structure of the optical path. Please refer to "Figure 2" to "Figure 5", which is the first in this creation. The reflection characteristics of the filter, the polarization filter, the second filter, and the third filter are as shown in the figure: as shown in "Figure 2", the first filter A1 in this creation is only for the first The beam of the wavelength is totally reflected, and the beam of the second wavelength and the third wavelength passes directly through the first filter A1 and is output.

As shown in "Figure 3", the polarization filter B1 in this creation is totally reflected for the transverse wave (S-wave) beam of the third wavelength, and the longitudinal (P-wave) and transverse (S-wave) of the second wavelength. And the longitudinal wave (P wave) beam of the third wavelength is directly output through the polarization filter B1.

As shown in Fig. 4, the second filter E1 in this creation is totally reflected for the light beam of the third wavelength, and the light beam of the second wavelength is directly output through the second filter A1.

As shown in Figure 5, the third filter G1 in this creation is totally reflected for the fourth wavelength, and the first, second, and third wavelength beams pass through the third. Filter G1 output.

The following is a description of the beam transmission paths for each channel of the wavelength division multiplexer. Please refer to Figure 6 to Figure 9 for a detailed description of the optical transmission paths of the four channels. Note: Please refer to "Figure 6" first. The following describes the transmission path of the first channel. The first light emitter 1A outputs a light beam having a first polarization state (longitudinal wave) and a first wavelength, and the light beam is first incident on the first filter A1 at an angle of 45 degrees, since the first filter A1 is for the first wavelength of the longitudinal wave (P wave) beam will be totally reflected, the light beam incident on the first filter A1 will be emitted to the coupling side 10D at an angle of 45 degrees (turning 90 degrees); the beam connecting line to the coupling side 10D It passes through the third filter G1 and directly penetrates the third filter G1 and is coupled to the optical fiber 30.

Please refer to "Figure 7". The following describes the transmission path of the second channel. The second light emitter 1B outputs a light beam having a first polarization state (longitudinal wave) and a second wavelength, and the light beam is incident on the second filter E1 and directly passes through the second filter E1, during which a compensation phase is passed. The 1/4 wave plate F1 and the 1/4 wave plate D1 maintain the original polarization state (longitudinal wave); the beam passing through the second filter E1 is a longitudinal wave (P wave) beam having a second wavelength, The beam is directly passed through the polarization filter B1 and the first filter A1 to the coupling side 10D; the beam connection reaching the coupling side 10D passes through the third filter G1 and directly passes through the third filter G1. Light is passed to the fiber 30.

Please refer to "Figure 8". The following describes the transmission path of the third channel. The third light emitter 1C output has a first polarization state (longitudinal wave) and a third wave The long beam, the beam first passes through the 1/2 wave plate C1, and the longitudinal wave (P wave) is converted into the transverse wave (S wave) beam, and the beam converted into the transverse wave (S wave) is first incident on the polarization filter at a 45 degree angle. In B1, since the polarization filter B1 is totally reflected for the transverse wave (S wave) beam, the light beam incident on the polarization filter B1 will be emitted to the second light collection side at an angle of 45 degrees (turning 90 degrees). 10B (since the light will be folded back 180 degrees here, here again defined as the light foldback side); the beam emerging to the coupling side 10D is the transverse wave (S wave) of the third wavelength, reaching the second filter E1 The total reflection is performed via the second filter E1, and after the total reflection, the beam is reciprocated twice through the quarter-wave plate D1, and the transverse wave (S-wave) beam is converted back to the longitudinal (P-wave) beam. The beam is converted into a third-wavelength longitudinal beam; the beam reflected back by the second filter E1 is a longitudinal (P-wave) beam having a third wavelength, which beam can pass directly through the polarization filter. a sheet B1, and the first filter A1 to the coupling side 10D; the beam connecting to the coupling side 10D passes through the third filter G1 and directly passes through the third G1 is coupled to the optical lens 30 of the optical fiber.

Please refer to "Figure 9". The following describes the transmission path of the fourth channel. The fourth light emitter 1D outputs a light beam having a first polarization state (longitudinal wave) and a fourth wavelength, and the light beam is first incident on the third filter G1 at an angle of 45 degrees, since the third filter G1 is directed to the longitudinal wave of the fourth wavelength The (P-wave) beam will be totally reflected, and the beam incident on the third filter G1 will exit at a 45 degree angle (turning 90 degrees) and be coupled to the fiber 30.

The above is a complete description of the optical path structure of the wavelength division multiplexer of the present invention. Hereinafter, a preferred embodiment of the optical path structure of the present wavelength division demultiplexer will be described. Please refer to FIG. 10, The schematic diagram of the optical path structure of the authoring wavelength division multiplexer is as shown in the figure: the improved optical path structure of the present invention is applied not only to wavelength division but also Outside the tool, the same optical path architecture can also be applied to one side of the demultiplexing multiplexer, and the beams of different channels are respectively transmitted to corresponding optical receivers (Receiver, RX) to complete the signal transmission.

The present invention provides an optical path structure improvement 200 for a wavelength division demultiplexer, including a first optical receiver 4A, a second optical receiver 4B, a third optical receiver 4C, and a fourth optical receiver 4D. A total reflection 稜鏡40, and an optical fiber 50.

The first optical receiver 4A is configured to receive a light beam having a first polarization state and a first wavelength, and the second light receiver 4B is configured to receive a light beam having a first polarization state and a second wavelength. The three-light receiver 4C is configured to receive a light beam having a first polarization state and a third wavelength, and the fourth light receiver 4C is configured to receive the light beam having the first polarization state and the fourth wavelength. In a preferred embodiment, the optical receiver may be, for example, a pn junction diode, a pin diode, an avalanche diode, or a metal-semiconductor. -Metal, MSM) Light detectors, etc., are not limited in this creation.

The total reflection 稜鏡40 has a first light-emitting side 40A corresponding to the first light receiver 4A and a second light-emitting side 40B corresponding to the second light receiver 4B in four directions, one corresponding to The third light emitting side 40C of the third light receiver 4C and a light coupling side 40D. The first light-emitting side 40A and the third light-emitting side 40C are disposed on opposite sides, and the second light-emitting side 40B and the light-coupled side 40D are opposite to the first light-emitting side 40A and the third light-emitting side. The side 40C is vertically disposed on opposite sides.

The total reflection 稜鏡40 has a first light exiting side 40A and The light coupling side 40D is disposed at an angle of 45 degrees to reflect the first wavelength beam of the first wavelength beam and a second light exiting side 40B and the third light exiting side 40C are disposed at an angle of 45 degrees to reflect the second polarization. Polarized filter B4 of the state beam. In the same manner as the wavelength division multiplexer described above, the total reflection 稜鏡40 of the wavelength division demultiplexer in the present embodiment is a 稜鏡 block composed of two pairs of right-angled triangles ,, the total reflection 稜鏡40 includes a first crucible 41 and a second crucible 42. The polarizing filter B4 and the first filter A4 are plated on the inclined joint surface between the first crucible 41 and the second crucible 42. In the present embodiment, the first polarization state refers to a case where the polarization mode of the light beam is a longitudinal wave (P wave), and the second polarization state refers to a case where the polarization mode of the light beam is a transverse wave (S wave). The same reason can be proved, the opposite can also be carried out.

The first filter A4 is disposed between the first light-emitting side 40A and the light-coupled side 40D to align the first light-emitting side 40A and the light-coupled side 40D to the same reflective surface of the first filter A4. . The polarization filter B4 is disposed between the second light-emitting side 40B and the third light-emitting side 40C to align the second light-emitting side 40B and the third light-emitting side 40C to the same reflection of the polarization filter B4. On the surface. The arrangement on the same reflective surface as used herein means that the positions where the two are located are mutually corresponding to the incident and exiting on the reflection plane (ie, the non-penetrating side).

A 1/2 wave plate C4 is disposed between the third light exiting side 40C of the total reflection 稜鏡40 and the third light receiver 4C, and a light beam passing through the 1/2 wave plate C4 is retarded by a phase angle of 2θ, for example, incident. If the beam is a longitudinal wave (P wave), it will be output as a transverse wave (S wave). Similarly, when the incident beam is transverse (S wave), it will be output as a longitudinal wave (P wave). A second quarter wave plate D4, a second filter E4 for back reflecting the third wavelength light beam, and a compensation phase are sequentially disposed between the second light receiving side 40B and the second light receiver 4B. 1/4 wave plate F4. The 1/4 wave plate D4 and the compensation phase are 1/4 wave plate F4 The combination of the two happens to cause the passing beam (the second wavelength beam) to pass back and then deflect back to the same phase, so that the passing beam and the output beam exhibit the same polarization state (S wave output is S wave, P wave output is P wave) ).

A third filter G4 is disposed in the coupling direction of the coupling side 40D of the total reflection 稜鏡40, and the third filter G4 is disposed at an angle of 45 degrees with respect to the fourth optical receiver 4D and the coupling direction. The light beam for reflecting the fourth wavelength is used to transfer the light beam to the fourth light receiver 4D after being turned 90 degrees.

In this embodiment, the wavelength division multiplexer in the previous embodiment applies the same optical path structure. In the first embodiment, the first filter A1 and the first filter A4 are used in the first embodiment. The polarization filter B1 and the polarization filter B4, the second filter E1 and the second filter E4, the third filter G1 and the third filter G4 have the same reflection characteristics, and the following description of the optical path structure may be used. It is understood with reference to the characteristic diagrams shown in FIGS. 2 to 5.

The following is a description of the beam transmission paths of each channel of the multiplexed multiplexer. Please refer to Figure 11 to Figure 14 for a detailed description of the optical transmission paths of the four channels. As shown in the figure: Please refer to "Figure 11" first. The following describes the transmission path of the first channel. The optical fiber 50 sends a light beam having a first polarization state (longitudinal wave) and a first wavelength toward the total reflection 稜鏡40, and the light beam passes through the third filter G4 and is incident on the light coupling side 40D of the total reflection 稜鏡40; the light beam enters the light beam The coupling side 40D continues to advance and is incident on the first filter A4 at an angle of 45 degrees, since the first filter A4 is totally reflected for the longitudinal wave (P wave) beam of the first wavelength, incident on the first filter The light beam on the mirror A4 will be emitted to the first light exiting side 40A at an angle of 45 degrees (turning 90 degrees) and incident on the first light receiver 4A.

Please refer to "Figure 12". The following describes the transmission path of the second channel. The optical fiber 50 sends a light beam having a first polarization state (longitudinal wave) and a second wavelength toward the total reflection 稜鏡40, and the light beam passes through the third filter G4 and is incident on the light coupling side 40D of the total reflection 稜鏡40; the light beam enters the light beam The light coupling side 40D continues to advance and directly passes through the first filter A4 and the polarization filter B4 to the second light exiting side 40B; after passing through the second light exiting side 40B, the light beam is incident on the second filter E4 and directly Through the second filter E4, the light beam maintains the original polarization state (longitudinal wave) and finally enters the second portion by sequentially passing through a quarter-wave plate D4 and a compensating phase quarter wave plate F4. Optical receiver 4B.

Please refer to "Figure 13". The following describes the transmission path of the third channel. The optical fiber 50 sends a light beam having a first polarization state (longitudinal wave) and a third wavelength toward the total reflection 稜鏡40, and the light beam passes through the third filter G4 and is incident on the light coupling side 40D of the total reflection 稜鏡40, and directly passes through Passing through the first filter A4 and the polarization filter B4 to the second light-receiving side 40B (since the light will be folded back 180 degrees here, here again defined as the light-folding side); exiting to the second light-receiving side The light beam of 40B is a longitudinal wave (P wave) of the third wavelength, and the second filter E4 is totally reflected by the second filter E4, and the beam is reciprocated through the quarter wave plate D4 twice after total reflection. At this time, the longitudinal (P wave) beam will be converted into a transverse wave (S wave) beam. At this time, the beam is converted into a transverse wave of the third wavelength; the beam converted to the transverse wave (S wave) is incident at a 45 degree angle. In the polarization filter B4, since the polarization filter B4 is totally reflected for the transverse wave (S wave) beam, the light beam incident on the polarization filter B4 will be emitted at a 45 degree angle (90 degrees). a third light exiting side 40C, wherein the light beam has a second polarization state (S wave) and a third wavelength; the light beam passes through the third light exiting side 40C After 1/2 wave plate line C4, a shear (S-wave) is converted into the longitudinal wave (P wave) light beam, and is incident on the third light receiver 4C.

Please refer to "Figure 14". The following describes the transmission path of the fourth channel. The optical fiber 50 sends a light beam having a first polarization state (longitudinal wave) and a fourth wavelength toward the total reflection 稜鏡40, and the light beam is first incident on the third filter G4 at an angle of 45 degrees, since the third filter G4 is directed to the fourth wavelength The longitudinal (P wave) beam will be totally reflected, and the beam incident on the third filter G4 will be emitted to the fourth photoreceiver 4D at a 45 degree angle (90 degrees).

In summary, the creation of the optical path structure can effectively reduce the volume of the multiplexer and the multiplexer as a whole, thereby increasing the convenience of product use. In addition, through the improvement of the optical path structure, the creation can reduce the number of institutions in the product, thereby reducing the cost of product production.

The above has been described in detail in the above, except that the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the creation of the creation, that is, the equality of the patent application scope of the creation. Changes and modifications are still covered by the patents of this creation.

Claims (13)

An optical path structure improvement comprising: a light emitter for outputting a light beam having a first polarization state and a specific wavelength; and a total reflection enthalpy having a light collection side, a light return side, and a coupling side The light-receiving side is corresponding to an output direction of the light emitter, and the light-returning side is disposed at an opposite position of the light-coupled side, and the light-receiving side of the total reflection 稜鏡 is connected to the light emitter a 1/2 wave plate is disposed, and the total reflection 稜鏡 is disposed between the light receiving side and the light folding side to provide a polarization filter for reflecting the second polarization state light beam. a 1/4 wave plate and a filter disposed on the 1/4 wave plate for reflecting the light beam of the specific wavelength, the output of the light emitter is converted into a second polarization state via the 1/2 wave plate, incident And the polarizing filter is reflected and reflected to the light folding side, and the light beam of the specific wavelength is reversely reflected through the filter to be secondarily converted back to the first polarization state beam by the 1/4 wave plate, and passed through the polarization filtering The chip is output to the coupling side. The optical path structure improvement according to the first aspect of the invention, wherein the total reflection system includes a first cymbal and a second cymbal, the polarization filter is coupled to the first cymbal and the Between the second one. The improvement of the optical path structure according to claim 1, wherein the polarizing filter is configured to deflect the light beam of the light emitter by 90 degrees and then exit the light returning side. An optical path structure improvement comprising: a light receiver; and a total reflection 稜鏡 having a light exiting side, a light returning side, and a coupling side, the light emitting side corresponding to the light receiving direction of the light receiver The light-returning side is disposed at an opposite position of the light-coupled side, and the total reflection 稜鏡 is provided with a polarization filter for reflecting the second polarization state beam between the light-emitting side and the light-returning side. a light-returning side is provided with a 1/4 wave plate and a filter disposed on the 1/4 wave plate for reflecting a specific wavelength of light, the light-emitting side of the total reflection 稜鏡 and the light receiver A 1/2 wave plate is disposed between the first polarization state and the light beam of the specific wavelength passing through the polarization filter and entering the light conversion side through the filter. Reflecting the light beam of the specific wavelength and performing second-order conversion to a second polarization state light beam through the 1/4 wave plate, and transforming the second polarization state light beam to the light exiting side via the polarization filter to perform 1/2 wave plate conversion Returning to the first polarization state beam and transmitting to the light Receiver. The improvement of the optical path structure according to claim 4, wherein the total reflection enthalpy includes a first 稜鏡 and a second 稜鏡, the polarization filter is coupled to the first 稜鏡 and the Between the second one. The improvement of the optical path structure according to claim 4, wherein the polarization filter deflects the light beam on the light-return side by 90 degrees and then exits the light receiver. An optical path structure improvement of a wavelength division multiplexer includes: a first light emitter for outputting a light beam having a first polarization state and a first wavelength; and a second light emitter for outputting a first polarization state And a light beam of a second wavelength; a third light emitter for outputting a light beam having a first polarization state and a third wavelength; and a total reflection enthalpy having a first light corresponding to the first light emitter a light receiving side, a second light receiving side corresponding to the second light emitter, a third light collecting side corresponding to the third light emitter, and a light coupling side, wherein the first light collecting side and The third light-receiving side is disposed on opposite sides, and the second light-receiving side and the light-coupled side are perpendicular to the first light-receiving side and the third light-receiving side On the side, the total reflection dome has a first filter disposed at a 45-degree angle with respect to the first light-receiving side and the coupling side to reflect the first wavelength beam, and a second light-receiving side and The third light collecting side is provided with a polarization filter for reflecting the second polarization state beam at an angle of 45 degrees. The first filter is disposed between the first light receiving side and the light coupling side to align the first light receiving side and the light coupling side to the same reflective surface of the first filter, the polarization type The filter is disposed between the second light-receiving side and the third light-receiving side, and the second light-receiving side and the third light-receiving side are aligned on the same reflective surface of the polarization filter. A 1/2 wave plate is disposed between the third light collecting side of the reflective pupil and the third light emitter, and a quarter wave is sequentially disposed between the second light collecting side and the second light emitting device. A slice, a second filter for retroreflecting the third wavelength beam, and a compensation phase for the quarter wave plate. The optical path structure of the wavelength division multiplexer according to claim 7, further comprising a fourth light emitter and a coupling light direction disposed on a coupling side of the total reflection 稜鏡a third filter for outputting a light beam having a first polarization state and a fourth wavelength, wherein the third filter is disposed at an angle of 45 degrees with respect to the fourth light emitter and the coupling light direction for reflection The beam of the fourth wavelength. The optical path structure of the wavelength division multiplexer according to claim 8 further includes an optical fiber and a coupling lens disposed between the optical fiber and the third filter for passing through All of the beams of the third filter are bundled to the fiber. The optical path structure of the wavelength division multiplexer according to any one of claims 7 to 9, wherein the total reflection enthalpy includes a first 稜鏡 and a second 稜鏡, the polarization The filter and the first filter are coupled between the first turn and the second turn. An optical path structure improvement of a wavelength division demultiplexer includes: a first optical receiver for receiving a light beam having a first polarization state and a first wavelength; and a second optical receiver for receiving a first polarization a light beam of a state and a second wavelength; a third light receiver for receiving light having a first polarization state and a third wavelength And a total reflection 稜鏡 having a first light exit side corresponding to the first light receiver, a second light exit side corresponding to the second light receiver, and a third light receiver corresponding to the third light receiver a third light-emitting side and a light-emitting side, wherein the first light-emitting side and the third light-emitting side are disposed on opposite sides, and the second light-emitting side and the light-coupled side are opposite to the first light-emitting side The side and the third light exiting side are disposed perpendicularly on opposite sides, and the total reflection unit has a half angle with respect to the first light exiting side and the light coupling side at a 45 degree angle for reflecting the first wavelength beam. a first filter and a polarization filter for reflecting a second polarization state beam at a 45-degree angle with respect to the second light-emitting side and the third light-emitting side, the first filter system being disposed on the first light-emitting side The first light-emitting side and the light-coupled side are aligned with the first reflecting surface of the first filter, and the polarization filter is disposed on the second light-emitting side and the third light-emitting side. Aligning the second light exiting side and the third light emitting side to the same reflection of the polarizing filter a 1/2 wave plate is disposed between the third light emitting side of the total reflection pupil and the third light receiver, and the second light receiving side and the second light receiver are sequentially disposed between A quarter-wave plate, a second filter for retroreflecting the third wavelength beam, and a quarter-wave plate for compensating the phase. The optical path structure improvement of the wavelength division demultiplexer according to claim 11, further comprising a fourth optical receiver and a coupling light direction disposed on the coupling side of the total reflection 稜鏡a third filter, the fourth light receiver is configured to receive a light beam having a first polarization state and a fourth wavelength, wherein the third filter is disposed at an angle of 45 degrees with respect to the fourth light receiver and the coupling light direction. Reflecting the fourth Wavelength of the wavelength. The optical path structure of the wavelength division demultiplexer according to any one of claims 11 to 12, wherein the total reflection system includes a first 稜鏡 and a second 稜鏡, the polarization The filter is coupled to the first filter between the first turn and the second turn.