WO2020022553A1

WO2020022553A1 - Wavelength multiplexing bidirectional optical transmitting/receiving device

Info

Publication number: WO2020022553A1
Application number: PCT/KR2018/010570
Authority: WO
Inventors: 박기성; 황월연; 최진수; 주관종
Original assignee: (주)코셋
Priority date: 2018-07-26
Filing date: 2018-09-10
Publication date: 2020-01-30
Also published as: CN112368955A; KR102041589B1

Abstract

A wavelength multiplexing bidirectional optical transmitting/receiving device according to one embodiment of the present invention comprises: a light transmitting block; an optical transmission band-pass filtering unit provided on one side of the light transmitting block; and an optical reception band-pass filtering unit provided on one side or the other side of the light transmitting block, wherein an optical transmission signal, passing through the optical transmission band-pass filtering unit so as to be incident on the light transmitting block, is reflected by the optical reception band-pass filtering unit and is discharged to the outside of the light transmitting block, and an optical reception signal, being incident from the outside so as to pass through the light transmitting block, passes through the optical reception band-pass filtering unit and is reflected by the optical transmission band-pass filtering unit.

Description

Wavelength Multi-Directional Optical Transceiver

The present invention relates to a wavelength multi-directional bidirectional optical transmission and reception device.

6 shows a general optical transmission and reception device having one transmission and one reception wavelength, respectively, and FIGS. 7 and 8 illustrate a general wavelength multiple optical transmission and reception device having n + 1 and m + 1 wavelengths, respectively.

As shown in FIG. 6, a general optical transmission / reception apparatus includes a 45 degree filter. The 45 degree filter transmits the light of wavelength λ _T emitted from the light emitting portion, and the light transmission signal is output to the outside through the optical fiber. In addition, the light reception signal having the wavelength λ _R received from the external optical fiber is reflected by the 45 degree filter and incident to the light receiving unit.

Since the 45-degree filter has a large incident angle of 45 degrees, the filtering function may not be smoothly performed when the distance between the wavelength λ _T of the optical transmission signal and the wavelength λ _R of the optical reception signal is small. This means that the light at each wavelength transmitted and reflected is lost and the interference entering along the path of the relative channel is increased.

As shown in FIG. 7, the 45 degree filter transmits the multi-wavelength light transmission signal output from the wavelength multiplex light transmission module, and thus the multi-wavelength light transmission signal is output to the outside through the optical fiber. In addition, the 45 degree filter reflects the multi-wavelength light reception signal input through the optical fiber from the outside to the wavelength multiplex light receiving module. For the 45-degree filter to filter the multi-wavelength optical transmission signal and the optical reception signal, the distance between the wavelength band of the optical transmission signal and the wavelength band of the optical reception signal must be large. Otherwise, the filtering function may not be performed smoothly. Can be.

In the general optical transmitter and receiver of FIG. 6 and FIG. 7, the interval between the wavelength band of the optical transmission signal and the wavelength band of the optical reception signal is relatively large due to the use of a 45 degree filter having a large incident angle. Can be.

Accordingly, as shown in FIG. 8, a wavelength multiplexing optical transmission and reception apparatus capable of smooth operation even when the distance between the wavelength band of the optical transmission signal and the wavelength band of the optical reception signal is relatively small is used.

However, the wavelength multiplexed optical transmitter and receiver of FIG. 8 employs a green lens to reduce the angle of incidence of light to the filter. However, compared to the optical transceivers of FIGS. 6 and 7, each wavelength multiplexed optical transmitter and the optical fiber are provided. Since the receiving module and a separate wavelength multiple device must be connected by using an optical connector, the device becomes complicated and takes up more volume.

The wavelength multiplex bidirectional optical transmitter and receiver according to an embodiment of the present invention bidirectionally transmits a multichannel wavelength multiplex optical transmission signal and an optical reception signal through one strand of optical fiber, so that a gap between the transmission wavelength band and the reception wavelength band is narrow. The present invention provides a compact integrated bidirectional optical transmission module having excellent characteristics, overcoming disadvantages such as increased loss of transmission / reception channels and increased interference between channels.

The problem of the present application is not limited to the above-mentioned problem, and another problem that is not mentioned will be clearly understood by those skilled in the art from the following description.

According to one aspect of the invention, the light transmitting block; A band pass filtering unit for light transmission provided at one side of the light transmitting block; And a light reception band pass filtering unit provided at one side or the other side of the light transmission block, and the light transmission signal incident to the light transmission block through the light transmission band pass filtering unit is reflected to the light reception band pass filtering unit. The light reception signal is emitted to the outside of the light transmission block, and is incident from the outside and passes through the light transmission block. The light reception signal passes through the light reception band pass filtering unit and is reflected to the light transmission band pass filtering unit.

The optical transmission signal includes light of a first wavelength band to an Mth wavelength band (M is a natural number of 2 or more), and the optical reception signal is of a (M + 1) th wavelength band to an Nth wavelength band (N is M +). The light transmission band pass filtering unit transmits the light of the first wavelength band to the Mth wavelength band, respectively, and the (M + 1) th wavelength band to the Nth wavelength. And a first band pass filter to a M band pass filter for reflecting light in a band, wherein the light reception band pass filtering unit reflects light in the first wavelength band to the Mth wavelength band, +1) may include a (M + 1) th bandpass filter to an Nth bandpass filter for transmitting light of the wavelength band to the Nth wavelength band, respectively.

The light transmitting band pass filtering unit and the light receiving band pass filtering unit are provided on one side of the light transmitting block, and a reflective film capable of reflecting the light transmitting signal and the light receiving signal on a predetermined portion of the other side of the light transmitting block. The anti-reflective film may be formed in another predetermined portion of the other side of the light transmitting block so that the transmitted and received light can be easily inputted and outputted without reflection loss.

The light transmitting band pass filtering part may be provided at one side of the light transmitting block, and the light receiving band pass filtering part may be provided at the other side of the light transmitting block.

Some of the band pass filters of the light transmitting band pass filtering part are provided at one side of the light transmitting block, and the other part is provided at the other side of the light transmitting block, and some of the band pass filters of the light receiving band pass filtering part are provided. It may be provided on one side of the light transmitting block, the rest may be provided on the other side of the light transmitting block. In the light transmission block, a portion of the transmission / reception light input and output may be formed with an anti-reflection film in order to reduce the reflection loss of the light.

The wavelength increases from the first wavelength band to the Mth wavelength band, and the order in which the first bandpass filter to the Mth bandpass filter is disposed in the light transmitting block is the Mth in the first wavelength band. The order of the wavelength bands may be different.

The wavelength increases from the (M + 1) th wavelength band to the Nth wavelength band, and the order in which the (M + 1) th bandpass filter or the Nth bandpass filter is disposed in the light transmitting block is the first order. In the (M + 1) wavelength band, the order of the Nth wavelength band may be different.

Each bandpass filter of the optical transmission channel passing through the first bandpass filter through the Mth bandpass filter and the optical reception channel passing through the (M + 1) th bandpass filter through the Nth bandpass filter are respectively The order in which the light transmitting blocks are arranged may be arbitrarily arranged without distinguishing the optical transmitting and receiving channels.

According to another aspect of the invention, the light transmitting portion including a plurality of light transmitting blocks spaced apart from each other; An optical transmission band pass filtering unit and an optical reception band pass filtering unit provided in the light transmitting unit; And an edge filtering unit through which light in a wavelength band other than the plurality of wavelength bands passes when a plurality of wavelength band light passes through one light transmitting block of the plurality of light transmitting blocks. The unit performs a band pass filtering function for light transmission signals of different wavelength bands emitted from the plurality of light emitting units, and the light receiving band pass filtering unit includes light receiving signals of different wavelength bands incident to the plurality of photoelectric conversion units. The bandpass filtering function may be performed.

The light transmitting band pass filtering part may be provided in the one light transmitting block, and the light receiving band pass filtering part may be provided in the other light transmitting block.

The optical transmission band pass filtering unit and the optical reception band pass filtering unit each include a plurality of optical transmission band pass filters and a plurality of optical reception band pass filters, and a part of the plurality of optical transmission band pass filters and the plurality of light reception units. Some of the credit bandpass filters may be provided in the one light transmitting block.

The edge filtering unit may be provided in one of the plurality of light transmitting blocks.

The edge filtering unit may be spaced apart from the light transmitting unit.

The wavelength multi-directional bidirectional optical transmission and reception apparatus according to the embodiment of the present invention uses a light transmission block having a small light incident angle and a band pass filter to reduce light loss and reduce interference between channels as well as to reduce the interference between the wavelength bands. By providing an integrated device, the optical transmission signal and the optical reception signal can be efficiently processed through one optical fiber.

The effects of the present application are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 to 3 show a wavelength multi-directional bidirectional optical transmission and reception device according to an embodiment of the present invention.

4 and 5 show a wavelength multi-directional bidirectional optical transmission and reception device according to another embodiment of the present invention.

6 shows a general optical transmission and reception apparatus.

7 and 8 show a general wavelength multiplex optical transceiver.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the accompanying drawings are only described in order to more easily disclose the contents of the present invention, and the scope of the present invention is not limited to the scope of the accompanying drawings that can be easily understood by those of ordinary skill in the art. You will know.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

1 and 2 show a wavelength multi-directional bidirectional optical transmission and reception device according to an embodiment of the present invention. As shown in Figure 1 and 2, the wavelength multi-directional bidirectional optical transmission apparatus according to an embodiment of the present invention is a light transmission block 100, a band-pass filtering unit 200 for optical transmission, and the optical water The credit band pass filtering unit 300 is included.

The light transmitting block 100 may be made of a material capable of transmitting light. For example, the material of the light transmitting block 100 may be glass, but is not limited thereto.

The light transmission band pass filtering unit 200 is provided at one side of the light transmission block 100, and the light reception band pass filtering unit 300 is provided at one side or the other side of the light transmission block 100. For example, in FIG. 1, the light transmission and light reception band pass filtering unit 300 is provided at one side of the light transmission block 100, and in FIG. 2, the light transmission and light reception band pass filtering unit 300 is optical. It is provided on the other side of the transmission block 100.

The light emitting unit 400 may output light transmission signals having different wavelengths, and may include light sources (T1 and T2 of FIG. 1 and T1 to T4 of FIG. 2) that emit light having different wavelengths. The light source may be a light emitting diode (LED) or a laser diode (LD), but is not limited thereto. The light transmission signal output from the light emitting unit 400 is converted into parallel light through the collimating lens and is incident on the light transmitting block 100.

At this time, the light transmission signal passes through the light transmission band pass filtering unit 200 and is incident to the light transmission block 100, and is reflected by the light reception band pass filtering unit and emitted to the outside of the light transmission block 100.

For example, as shown in FIG. 1, the band pass filters BF1 and BF2 of the optical band pass filter 200 pass a wavelength band having a center wavelength of λ 1 and λ 2 and reflect the remaining wavelength bands. Since the light transmission signals output from the light sources T1 and T2 have wavelength bands with the center wavelengths λ1 and λ2, they can pass through the bandpass filters BF1 and BF2.

Since the center wavelengths of light passing through the light receiving band pass filtering unit 300 are λ 3 and λ 4, the optical transmission signal is reflected by the light receiving band pass filtering unit 300 and is emitted from the light transmitting block 100 to collimate the lens. After focusing through the optical fiber (OF) can be output to the outside.

In this process, since the wavelength multiplexing is performed on the optical transmission signal, the optical transmission signal outputted from the optical fiber (OF) is mixed with light in a band having λ1 as the center wavelength and a band having λ2 as the center wavelength. It may be in the form.

Meanwhile, as shown in FIG. 1, a light reception signal in which light in a band having λ 3 as a center wavelength and light in a band having λ 4 as a center wavelength is mixed is input to an optical fiber (OF) from the outside and is parallel light through a collimating lens. After the conversion to the light transmission block 100 is incident.

The light reception signal in the wavelength band having λ4 as the center wavelength passes through the bandpass filter BF4 of the light receiving bandpass filtering unit 300 to reach the photoelectric conversion element R4 of the light receiving unit 500, and the wavelength having λ3 as the center wavelength. The light receiving signal of the band is reflected by the band pass filter BF4 and then passes through the band pass filter BF3 of the light receiving band pass filtering unit 300 to reach the photoelectric conversion element R3 of the light receiving unit 500. Through this process, demultiplexing of the optical reception signal may be performed. In this case, the light receiver 500 may include a photo diode, but is not limited thereto.

That is, the light reception signal incident from the outside and passing through the light transmitting block 100 passes through the light reception band pass filtering unit 300 and is reflected by the light transmission band pass filtering unit.

2, the light emitting unit 400 emits light of four wavelength bands having different center wavelengths λ1, λ2, λ3, and λ4, and the bandpass filters BF1, BF2, BF3 and BF4 respectively pass a wavelength band having a center wavelength λ1, a wavelength band having a center wavelength λ2, a wavelength band having a center wavelength λ3, and a wavelength band having a center wavelength λ4.

Accordingly, the optical transmission signal output from the optical fiber OF may be in a state where four wavelength bands, each of λ1 to λ4, are used as the center wavelength. In this process, the light-receiving band pass filter unit reflects light of four wavelength bands having λ1 to λ4 as center wavelengths.

Further, when an optical reception signal multiplexed with four wavelength bands each of λ5 to λ8 is input to the optical fiber OF from the outside, the bandpass filters BF5, BF6, BF7 and BF8 of the optical reception bandpass filter unit are respectively A wavelength band having a center wavelength λ5, a wavelength band having a center wavelength λ6, a wavelength band having a center wavelength λ7, and a wavelength band having a central wavelength λ8 are passed through.

Accordingly, the light reception signal may be demultiplexed into four wavelength bands of light having λ5 to λ8 as the center wavelengths. In this process, the light transmission band pass filter unit reflects light in four wavelength bands, each of λ5 to λ8 as the center wavelength.

As described above, the wavelength multi-directional bidirectional optical transmission / reception apparatus according to an exemplary embodiment of the present invention may process an optical transmission signal and an optical reception signal through one optical fiber OF without a conventional 45 degree filter. Since the bandpass filter passes the set wavelength band and reflects the remaining wavelength band, the bandpass filter can smoothly process the optical transmission signal and the optical reception signal even if the distance between two adjacent wavelength bands is not large.

The number of center wavelengths and the number of band pass filters are not limited to those in FIGS. 1 and 2.

On the other hand, the optical transmission signal is composed of light of the first wavelength band to the M-th wavelength band (M is a natural number of two or more), and the optical reception signal is the (M + 1) to N-th wavelength band (N is M + Natural light greater than 1).

The optical band pass filter 200 transmits light of a first wavelength band to a Mth wavelength band, and reflects light of a (M + 1) th wavelength band to an Nth wavelength band, respectively. To M-th band pass filter.

The light receiving band pass filtering unit 300 reflects light in the first wavelength band to the Mth wavelength band and transmits light in the (M + 1) th to Nth wavelength bands, respectively (M +). 1) a band pass filter to an N-th band pass filter.

For example, in the case of the wavelength multi-directional bidirectional optical transceiver of FIG. 2, M may be 4 and N may be 8. Since it has been described in detail above, a description thereof will be omitted.

1 and 3, the light transmission band pass filtering unit 200 and the light reception band pass filtering unit 300 may be provided at one side of the light transmission block 100. In addition, a reflective film RL capable of reflecting the light transmission signal and the light reception signal may be formed on the other predetermined portion of the light transmitting block 100, and the reflection loss of the optical signal may be formed on the other predetermined portion where the optical signal is input / output. An anti-reflective film may be formed to reduce the number of layers.

The band pass filter passes the set wavelength band and reflects the light of the remaining wavelength band to the reflecting film RL provided on the other side of the light transmitting block 100. The reflecting film RL reflects light on one side of the light transmitting block 100. Can be reflected. That is, the reflective film RL may contribute to wavelength multiplexing or wavelength demultiplexing by reflecting the light reflected by one bandpass filter toward the other bandpass filter.

In this case, the one bandpass filter may be included in the optical bandpass filter 200 or the optical bandpass filter 300. In addition, the other band pass filter may also be included in the optical transmission band pass filtering unit 200 or the optical reception band pass filtering unit 300.

Unlike this, as shown in FIG. 2, the light transmission band pass filtering unit 200 is provided at one side of the light transmission block 100, and the light reception band pass filtering unit 300 is the other side of the light transmission block 100. It may be provided in. Since light of a wavelength band other than the wavelength band transmitted by the bandpass filter is reflected, the bandpass filter itself may perform the function of the reflective film RL of FIG. 1.

In addition, although not shown in the drawing, the band pass filter transmits only the light of the set wavelength band irrespective of the light transmission signal and the light reception signal, so that the light transmission band pass filtering unit 200 and the light reception band pass filtering on one side of the light transmission block. The band pass filter of the unit 300 may be mixed. Similarly, the band pass filter of the light transmission band pass filtering unit 200 and the light reception band pass filtering unit 300 may be mixed on the other side of the light transmitting block 100.

That is, some of the band pass filters of the light transmission band pass filtering unit 200 are provided at one side of the light transmission block 100, and the rest are provided at the other side of the light transmission block 100, and the band pass filtering for light reception. Some of the band pass filters of the unit 300 may be provided at one side of the light transmitting block 100, and the other may be provided at the other side of the light transmitting block 100.

Meanwhile, the wavelength increases from the first wavelength band to the Mth wavelength band, and the order in which the first bandpass filter to the Mth bandpass filter is disposed in the light transmitting block 100 is the first wavelength band in the Mth wavelength band. May differ from the order of

In addition, the wavelength increases from the (M + 1) th wavelength band to the Nth wavelength band, and the order in which the (M + 1) th bandpass filter to the Nth bandpass filter is disposed in the light transmitting block 100 is (1). M + 1) may be different from the order of the N-th wavelength band in the wavelength band.

For example, as shown in FIG. 3, the band pass of the light receiving band pass filtering unit 300 provided on one side of the light transmitting block 100 although the magnitude of the center wavelength is large in order of λ 1, λ 3, and λ 4. The filters may be arranged in the order of BF1, BF4 and BF4.

As described above, the order in which the bandpass filters are arranged may be different depending on the order of the wavelength bands that may pass through the bandpass filters because the bandpass filters transmit only light of a specific wavelength band. That is, regardless of the order in which the band pass filters are arranged, light having a specific wavelength band may travel through the light transmitting block 100 and reach the corresponding band pass filter to be transmitted.

As described above, the wavelength multiplex bidirectional optical transmission / reception apparatus according to an exemplary embodiment of the present invention uses a bandpass filter to process a wavelength multiplexed optical transmission signal or an optical reception signal according to wavelength demultiplexing, thereby irrespective of the order of center wavelengths. The arrangement of is possible.

In addition, each of the bandpass filters of the optical transmission channel passing through the first bandpass filter through the Mth bandpass filter and the optical reception channel passing through the (M + 1) th through Nth bandpass filters is a light transmission block. The order arranged in may be arbitrarily arranged without distinction between the optical transmission and reception channels.

Next, referring to FIGS. 4 and 5, a wavelength multi-directional bidirectional optical transmission / reception apparatus according to another embodiment of the present invention will be described.

In accordance with another embodiment of the present invention, a wavelength multi-directional bidirectional optical transmission apparatus includes a light transmission unit 550, a light transmission band pass filtering unit 200, a light reception band pass filtering unit 300, and an edge filtering unit 600. ).

The light transmitting part 550 includes a plurality of light transmitting blocks 700 and 800 spaced apart from each other. Since the material of the light transmitting blocks 700 and 800 has been described above, a description thereof will be omitted.

The light transmission band pass filtering unit 200 and the light reception band pass filtering unit 300 are provided in the light transmission unit 550. In another embodiment of the present invention, the optical bandpass filtering unit 200 and the optical bandpass filtering unit 300 may be variously disposed.

For example, as illustrated in FIGS. 4 and 5, band pass filters of the light transmission band pass filtering unit 200 are provided at one side of one light transmitting block 700, and another light transmitting block ( Band pass filters of the light reception band pass filtering unit 300 may be provided at one side of the 800. In this case, the reflective film RL may be formed on the other side of the one light transmitting block 700 and the other side of the other light transmitting block 800. Since the reflective film RL has been described in detail above, the description thereof will be omitted.

Alternatively, some of the band pass filters of the light transmission and light reception band

pass filtering units

200 and 300 may be provided at one side of one light transmission block 700, and the light transmission and light reception band pass filtering units 300 may be formed. The other of the band pass filters may be provided at one side of the other light transmitting block 800. In this case, the reflective film RL may be formed on the other side of the one light transmitting block 700 and the other side of the other light transmitting block 800.

Some of the band pass filters of the light transmission band pass filtering unit 200 are provided at one side of one light transmitting block 700, and some of the band pass filters of the light reception band pass filtering unit 300 are one It may be provided on the other side of the light transmitting block 700.

In addition, the remaining of the band pass filters of the optical band pass filter 200 is provided on one side of the other light transmission block 800, the remaining of the band pass filters of the optical band pass filter 300 The other light transmitting block 800 may be provided on the other side.

In this case, since the band pass filters disposed in one light transmitting block 700 and the other light transmitting block 800 function as the reflective film RL, a normal operation may be performed without the reflective film RL.

Such an arrangement relationship is only one example, and various arrangements other than the above may be made according to design conditions.

When light of a plurality of wavelength bands passes through the light transmitting block 700 of one of the plurality of light transmitting blocks 700 and 800, light of a wavelength band other than the plurality of wavelength bands passes through the edge filtering unit 600. do.

For example, as shown in FIG. 4, the edge filter unit is provided in one of the plurality of light transmitting blocks 700 and 800, and light in a wavelength band having each of λ 0 to λ 3 as a center wavelength is transmitted through the one light. When passing through the block 700, the edge filter unit may reflect light in a wavelength band having each of the wavelengths λ0 to λ3 as a center wavelength, and may pass light in a wavelength band other than the center wavelengths (center wavelengths λ4 to λ7).

Alternatively, as shown in FIG. 5, the edge filtering unit 600 may be spaced apart from the light transmitting unit. In this case, various optical elements (eg, the mirror M) may be provided to form the light path. When the edge filter portion of FIG. 5 passes through the light transmitting block 700 with light having a wavelength of about λ0 to λ3 as the center wavelength, the edge filter portion has light having a wavelength of λ0 to λ3 as a center wavelength. Can be passed through, and light in other wavelength bands (center wavelengths? 4 to? 7) can be reflected.

Accordingly, wavelength transmission multiplexing of the light transmission signal may be performed in one light transmission block 700, and wavelength demultiplexing of the light reception signal may be performed in another light transmission block 800.

In this case, the optical bandpass filter 200 may perform a bandpass filtering function for optical transmission signals having different wavelength bands emitted from the plurality of light emitting units 400. In addition, the light receiving band pass filtering unit 300 may perform a band pass filtering function for light reception signals having different wavelength bands incident on the plurality of light receiving units 500.

Accordingly, the optical transmission signal and the optical reception signal in which light of various wavelength bands are mixed may be transmitted through one optical fiber OF.

According to the functions of the edge filtering unit 600 of FIGS. 4 and 5, the wavelength-multiplexed light transmission signal emitted from the light emitting unit 400 is output to the outside through the collimating lens and the optical fiber OF, and is externally lighted. The light reception signal input through the fiber OF may be demultiplexed and input to the light receiver 500.

As described above, the embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope of the present invention can be embodied by those skilled in the art. It is self-evident to. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

Claims

Light transmitting blocks;

A band pass filtering unit for light transmission provided at one side of the light transmitting block; And

It includes a light receiving band pass filtering unit provided on one side or the other side of the light transmitting block,

The light transmission signal incident to the light transmission block through the light transmission band pass filtering unit is reflected to the light reception band pass filtering unit and emitted to the outside of the light transmission block,

And a light receiving signal incident from the outside and passing through the light transmitting block passes through the light receiving band pass filtering unit and is reflected by the light transmitting band pass filtering unit.
The method of claim 1,

The optical transmission signal is made of light of the first wavelength band to the M-th wavelength band (M is a natural number of 2 or more),

The light reception signal includes light of a (M + 1) th wavelength band to an Nth wavelength band (N is a natural number larger than M + 1),

The optical band pass band filtering unit,

A first bandpass filter to an Mth bandpass filter that transmits light of the first wavelength band to the Mth wavelength band, and reflects light of the (M + 1) th wavelength band to the Nth wavelength band. and,

The light receiving band pass filtering unit,

(M + 1) bandpass filters to N-th bands for reflecting light in the first to Mth wavelength bands and transmitting light in the (M + 1) th to Nth wavelength bands, respectively. A wavelength multi-directional bidirectional optical transmission and reception device comprising a pass filter.
The method according to claim 1 or 2,

The light transmission band pass filtering unit and the light reception band pass filtering unit are provided at one side of the light transmission block,

Wavelength multi-directional optical transmission and reception device, characterized in that the other side of the light transmitting block is formed with a reflective film for reflecting the light transmission signal and the light reception signal.
The method according to claim 1 or 2,

The light transmission band pass filtering unit is provided on one side of the light transmission block, and the light reception band pass filtering unit is provided on the other side of the light transmission block.
The method according to claim 1 or 2,

Some of the band pass filters of the light transmission band pass filtering part are provided at one side of the light transmitting block, and the other part is provided at the other side of the light transmitting block.

And some of the band pass filters of the light receiving band pass filtering part are provided at one side of the light transmitting block, and the other part is provided at the other side of the light transmitting block.
The method of claim 2,

The wavelength increases from the first wavelength band to the Mth wavelength band,

The order of the first band pass filter to the M-th band pass filter disposed in the light transmitting block is a wavelength multi-directional two-way optical transmission and reception device, characterized in that different from the order of the M wavelength band in the first wavelength band.
The method of claim 2,

The wavelength increases from the (M + 1) th wavelength band to the Nth wavelength band,

The order in which the (M + 1) th bandpass filter and the Nth bandpass filter are arranged in the light transmitting block is different from the order of the Nth wavelength band in the (M + 1) th wavelength band. Wavelength multiple bidirectional optical transmission and reception device.
A light transmitting part including a plurality of light transmitting blocks spaced apart from each other;

An optical transmission band pass filtering unit and an optical reception band pass filtering unit provided in the light transmitting unit; And

When the plurality of wavelength bands of light passes through one of the plurality of light transmitting blocks, the edge filtering unit for passing light of a wavelength band other than the plurality of wavelength bands,

The bandpass filtering unit for optical transmission performs a bandpass filtering function for optical transmission signals of different wavelength bands emitted from a plurality of light emitting units,

The optical reception bandpass filtering unit, the wavelength multi-directional bidirectional optical transmission and reception device, characterized in that for performing the bandpass filtering function for the light reception signal of the different wavelength band incident to the plurality of photoelectric conversion unit.
The method of claim 8,

The light transmission band pass filtering unit is provided in the one light transmitting block,

The optical reception bandpass filtering unit is a wavelength multi-directional optical transmission and reception device, characterized in that provided in the other light transmitting block.
The method of claim 8,

The optical transmission band pass filtering unit and the optical reception band pass filtering unit each include a plurality of optical transmission band pass filters and a plurality of optical reception band pass filters,

And a portion of the plurality of light transmission band pass filters and a portion of the plurality of light reception band pass filters are provided in the one light transmitting block.
The method of claim 8,

The edge filtering unit is a wavelength multi-directional bidirectional optical transmission and reception device, characterized in that provided in one of the plurality of light transmitting blocks.
The method of claim 8,

The edge filtering unit is a wavelength multi-directional bi-directional optical transmission and reception device, characterized in that the installation is spaced apart from the light transmission.