CN213398973U - Single-side output compact type coarse wavelength division multiplexer - Google Patents
Single-side output compact type coarse wavelength division multiplexer Download PDFInfo
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- CN213398973U CN213398973U CN202021822187.0U CN202021822187U CN213398973U CN 213398973 U CN213398973 U CN 213398973U CN 202021822187 U CN202021822187 U CN 202021822187U CN 213398973 U CN213398973 U CN 213398973U
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Abstract
The utility model provides a unilateral output compact coarse wavelength division multiplexer, including the 1 st 1 … n 2-1 elementary long wave pass filter, the 1 st 1 … n 2 secondary long wave pass filter, the 1 st 1 … n 2, n 2+1 speculum, the 1 st 1 … n prism, input collimator and the 1 st 1 … n output collimator, the wavelength is lambda 1, lambda 2, lambda 3, lambda 4, … lambda n-1, lambda n's optical signal is inputed to the 1 st elementary long wave pass filter through input collimator, the utility model discloses a unilateral output compact coarse wavelength division multiplexer passes through the film interference of the 1 st 1 … n 2-1 elementary long wave pass filter step by step with lambda 1, lambda 2, lambda 3, lambda 4, … lambda n-1, lambda n separation transmission to the 1 st 1 … n 2 secondary long wave pass filter, separate single wavelength optical signal lambda 1 again through the film interference of the 1 st 1 … n 2 secondary long wave pass filter through lambda 1 … n long wave filter through lambda 1 And the output is also changed by the refraction of the 1 st 1 … n prism after being reflected by the 1 st 1 … n/2 th reflector, and then the optical signal is output, so that the optical structure with single-side output of the optical signal is formed, the optical structure is simple, the cost is low, and the optical structure has the beneficial effects of small size, low loss and simple film coating.
Description
Technical Field
The utility model relates to an optical fiber communication CCWDM technical field especially relates to a unilateral output compact coarse wavelength division multiplexer CCWDM.
Background
In the current passive optical communication product, CWDM is widely used, not only for short-distance transmission in metropolitan area networks, but also for 5G and 25G forward 6-wave passive optical modules by various operators, and a conventional method is formed by cascading 3-port devices, as shown in fig. 1, the working principle is as follows: a signal is input from a common terminal (COM), sequentially passes through 6 CWDM devices, and outputs a corresponding wavelength lambda 1 … lambda 6; another way uses the traditional free space compact CCWDM, and uses the free space coupling principle, and uses the large angle 13.5 degree CWDM filter to complete the transmission coupling, and the conventional device cascade optical path diagram is shown in fig. 2, in which the reference numerals 1,2,3,4,5,6 are CWDM BPF filters, the reference numerals 7,8,9,10,11,12,13 are collimators, and the working principle is: the signal is input from the collimator 7 end, and is output through a 1CWDM BPF band pass filter (thin film interference principle) and coupled to the corresponding output wavelength lambda 1 in the collimator 8 by using a Gaussian beam, the reflected signal is output through a 2CWDM BPF filter and coupled to the corresponding wavelength lambda 2 of the collimator 9, and similarly lambda 3 … lambda 6 signals are output through the collimators 10,11,12 and 13 respectively. The traditional CCWDM multiplexer has large size, high loss, complex optical structure and complex coating, and leads to higher cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a unilateral output compact coarse wavelength division multiplexer uses long-wave pass filter, prism, speculum to constitute the unilateral output optical structure of light signal, has solved optical structure simple, low cost's technical problem, and the utility model discloses a unilateral output CCWDM is small-size, and the loss is low, uses long-wave pass filter, and the coating film is simple.
The utility model discloses a solve the technical scheme that above-mentioned problem adopted and do:
the utility model provides a unilateral output compact coarse wavelength division multiplexer, including the 1 st 1 … n 2-1 elementary long wave pass filter, the 1 st 1 … n 2 secondary long wave pass filter, the 1 st 1 … n 2, n 2+1 speculum, the 1 st 1 … n prism, input collimator and the 1 st 1 … n output collimator;
the optical signals with the wavelengths of lambda 1, lambda 2, lambda 3, lambda 4, … lambda n-1 and lambda n are input to the 1 st primary long-wave pass filter through the input collimator, the 1 st primary long-wave pass filter separates the optical signals with the wavelengths of lambda 1 and lambda 2 and transmits the optical signals to the 1 st secondary long-wave pass filter, and separates the optical signals with the wavelengths of lambda 3, lambda 4 … lambda n-1 and lambda n and transmits the optical signals to the 2 nd primary long-wave pass filter; the 2 nd primary long-wave pass filter separates out the optical signal with the wavelength of lambda 3, the lambda 4 is transmitted to the 2 nd secondary long-wave pass filter, and the optical signal except the lambda 1 … lambda 4 is separated and transmitted backward step by step, finally, the n/2 th-1 st primary long-wave pass filter separates out the optical signal with the wavelength of lambda n-1, the optical signal of lambda n is reflected to the n/2 nd secondary long-wave pass filter by the n/2+1 th reflector;
the 1 st secondary long wave pass filter separates the optical signal with the wavelength of lambda 1, the optical signal with the wavelength of lambda 2 changes the output direction through the 1 st prism and is horizontally output through the 1 st output collimator, and the 1 st secondary long wave pass filter separates the optical signal with the wavelength of lambda 2, the optical signal with the wavelength of lambda 2 is reflected by the 1 st reflector, the output direction is changed through the 2 nd prism and is horizontally output through the 2 nd output collimator;
the 2 nd secondary long wave pass filter changes the output direction of the optical signal with the wavelength of lambda 3 and horizontally outputs the optical signal through a 3 rd prism and a 3 rd output collimator, and the 2 nd secondary long wave pass filter changes the output direction of the optical signal with the wavelength of lambda 4 after being reflected by a2 nd reflector and then horizontally outputs the optical signal through a 4 th prism and a 4 th output collimator;
the 3 … n/2 th sub-longwave pass filter separates the wavelength optical signal output of the lambda 5 … lambda n and so on:
the optical signal with the wavelength of lambdan-1 separated by the n/2 th secondary long wave pass filter changes the output direction through the n-1 th prism and is horizontally output through the n-1 th output collimator, and the optical signal with the wavelength of lambdan separated by the n/2 th secondary long wave pass filter changes the output direction through the n prism after being reflected by the n/2 th reflector and is horizontally output through the n-1 th output collimator.
Furthermore, the 1 st, 2 … n-1 st long-wave pass filter is obliquely arranged, and the 1 st, 2 … n/2 nd long-wave pass filter is vertically arranged.
Furthermore, the 1 st, 2 … n prism has an inclined bottom surface, and the length of the inner side surface connecting the inclined bottom surface is smaller than that of the outer side surface.
Furthermore, the optical signal of each wavelength is refracted by the inclined bottom surface of the prism into a horizontal optical signal, and the horizontal optical signal is output by the collimator.
The outer side surface of the 1 st, 3 rd, 5 th 5 … n-1 st prism is attached to the 1 st, 2 … n/2 nd secondary long wave pass filter.
Further, the longitudinal arrangement position of the 1 … n/2 th reflector is parallel to the outer side surface of the 1 … n prism, and each transverse arrangement position of the reflector is positioned between two adjacent prisms.
Furthermore, n in the optical signals with the wavelengths of lambda 1, lambda 2, lambda 3, lambda 4, … lambda n-1 and lambda n is even number in the 1 … n/2-1 primary long-wave pass filter, the 1 … n/2 secondary long-wave pass filter, the 1 … n/2, n/2+1 reflecting mirror, the 1 … n prism, the 1 … n output collimator.
When n is equal to 6, the 2 nd primary long wave pass filter separates the optical signal with the wavelength of lambda 5, the 4 th reflector reflects the optical signal with the wavelength of lambda 6 onto the 3 rd secondary long wave pass filter, the 3 rd secondary long wave pass filter separates the optical signal with the wavelength of lambda 5, the 5 th prism changes the output direction and the 5 th output collimator outputs horizontally, the 3 rd secondary long wave pass filter separates the optical signal with the wavelength of lambda 6, the 3 rd secondary long wave pass filter reflects the optical signal with the wavelength of lambda 6, the 6 th prism changes the output direction and the 6 th output collimator outputs horizontally.
The utility model has the advantages that: the utility model discloses a unilateral output compact coarse wavelength division multiplexer interferes lambda 1 step by step through the film of elementary long wave pass filter, lambda 2, lambda 3, lambda 4, … lambda n-1, lambda n separation transmission reaches secondary long wave pass filter, separate out single wavelength light signal again through secondary long wave pass filter film interference and export through the collimator, still use the speculum reflection back to export after prism refraction redirecting, thereby form the unilateral output optical structure of light signal, optical structure is simple, therefore, the carrier wave prepaid electric energy meter is low in cost, and possess the small-size, low loss, the simple beneficial effect of coating film.
Drawings
Fig. 1 is a schematic diagram of a conventional CWDM optical structure;
FIG. 2 is a schematic diagram of a conventional CCWDM optical architecture;
fig. 3 is an optical structure diagram of the single-side output compact coarse wavelength division multiplexer CCWDM of the present invention;
fig. 4 is a schematic structural diagram of a prism in the present invention;
FIG. 5 is a schematic structural diagram of the neutral density filter of the present invention;
fig. 6 is a schematic structural diagram of the collimator of the present invention.
Detailed Description
The following embodiments of the present invention are specifically explained with reference to the accompanying drawings, which are used for reference and illustration only and do not limit the scope of the present invention.
As shown in fig. 3-6, the present embodiment provides a single-side output compact coarse wavelength division multiplexer, which includes a1 … n/2-1 st primary long-wavelength pass filter, a1 … n/2 nd secondary long-wavelength pass filter, a1 … n/2 st, n/2+1 st reflector, a1 … n prism, an input collimator, and a1 … n output collimator;
optical signals with the wavelengths of lambda 1, lambda 2, lambda 3, lambda 4, … lambda n-1 and lambda n are input to a1 st primary long-wave pass filter A1 through an input collimator, the 1 st primary long-wave pass filter A1 separates optical signals with the wavelengths of lambda 1 and lambda 2 and transmits the optical signals to a1 st secondary long-wave pass filter B1, and the optical signals with the wavelengths of lambda 3, lambda 4 … lambda n-1 and lambda n are separated and transmitted to a2 nd primary long-wave pass filter A2; the 2 nd primary long-wave pass filter A2 separates the optical signal with the wavelength of lambda 3, the lambda 4 is transmitted to the 2 nd secondary long-wave pass filter B2, and the optical signals except the lambda 1 … lambda 4 are separated and transmitted backward step by step, finally, the n/2 th-1 st primary long-wave pass filter separates the optical signal with the wavelength of lambda n-1, the optical signal of lambda n is reflected to the n/2 nd secondary long-wave pass filter by the n/2+1 reflector;
the optical signal with the wavelength of lambda 1 separated by the 1 st secondary long-wave pass filter B1 is horizontally output through the 1 st output collimator D1 by changing the output direction through the 1 st prism C1, and the optical signal with the wavelength of lambda 2 separated by the 1 st secondary long-wave pass filter B1 is horizontally output through the 2 nd output collimator D2 by changing the output direction through the 2 nd prism C2 after being reflected by the 1 st reflector E1;
the 2 nd secondary long wave pass filter B2 separates the optical signal with the wavelength of lambda 3, the optical signal changes the output direction through a 3 rd prism C3 and is horizontally output through a 3 rd output collimator D3, the 2 nd secondary long wave pass filter B2 separates the optical signal with the wavelength of lambda 4, the optical signal is reflected by a2 nd reflector E2, the output direction is changed through a 4 th prism C4, and the optical signal is horizontally output through a 4 th output collimator D4;
the 3 … n/2 th sub-longwave pass filter separates the wavelength optical signal output of the lambda 5 … lambda n and so on:
the optical signal with the wavelength of lambdan-1 separated by the n/2 th secondary long wave pass filter changes the output direction through the n-1 th prism and is horizontally output through the n-1 th output collimator, and the optical signal with the wavelength of lambdan separated by the n/2 th secondary long wave pass filter changes the output direction through the n prism after being reflected by the n/2 th reflector and is horizontally output through the n-1 th output collimator.
In this embodiment, the 1 st, 2 … n-1 st primary long-wave pass filters A1 and A2 … An-1 are obliquely arranged, and the 1 st, 2 … n/2 th secondary long-wave pass filters B1 and B2 … Bn/2 are vertically arranged.
In this embodiment, the 1 st, 2 … n prism C1, C2 … Cn has an inclined bottom surface, and the length of the inner side surface connecting the inclined bottom surfaces is smaller than that of the outer side surface.
In this embodiment, the optical signal of each wavelength is refracted through the inclined bottom surface of the prism into a horizontal optical signal, and the horizontal optical signal is output through the collimator.
The outer side surface of the 1 st, 3 rd, 5 th 5 … n-1 st prism is attached to the 1 st, 2 … n/2 nd secondary long wave pass filter.
In the present embodiment, the longitudinal arrangement position of the 1 … n/2 th mirror is parallel to the outer side surface of the 1 … n th prism, and each mirror transverse arrangement position is located between two adjacent prisms.
In the embodiment, n in the optical signals with the wavelengths of lambda 1, lambda 2, lambda 3, lambda 4, … lambda n-1 and lambda n is even number in the 1 … n/2-1 primary long-wave pass filter, the 1 … n/2 secondary long-wave pass filter, the 1 … n/2, n/2+1 reflecting mirror, the 1 … n prism, the 1 … n output collimator.
In a further embodiment of this embodiment, as shown in fig. 1, when n is 6, the 2 nd primary long-wave pass filter a2 separates the optical signal with wavelength λ 5, the optical signal with wavelength λ 6 is reflected by the 4 th mirror E4 to the 3 rd secondary long-wave pass filter B3, the 3 rd secondary long-wave pass filter B3 separates the optical signal with wavelength λ 5 and outputs horizontally by the 5 th output collimator D5 through the 5 th prism C5 with changing the output direction, and the 3 rd secondary long-wave pass filter B3 separates the optical signal with wavelength λ 6 and outputs horizontally by the 6 th output collimator D6 through the 6 th prism C6 with changing the output direction after reflecting by the 3 rd mirror E3.
The utility model discloses unilateral output compact coarse wavelength division multiplexer's working process does:
as shown in FIG. 3, the optical signals λ 1- λ 6 are input through the first input collimator Di, the Gaussian beam is transmitted to the 1 st primary long-wave pass filter A1, the signals λ 1- λ 2 and λ 3- λ 6 are separated by thin-film interference, the reflected signals λ 1- λ 2 are transmitted to the 1 st secondary long-wave pass filter B1, the signals λ 1 and λ 2 are separated by thin-film interference again, the λ 1 changes the direction of the optical output signal to horizontal output through the 1 st prism C1, and is coupled into the 1 st collimator D1 optical fiber; the lambda 2 signal is transmitted to the 1 st mirror E1 and is transmitted to the 2 nd prism C2 through mirror reflection, and then the horizontal output is coupled into a2 nd collimator D2; λ 3- λ 6 are transmission signals and are transmitted to a2 nd primary long-wave pass filter A2, λ 3- λ 4 and λ 5- λ 6 signals are separated by thin film interference, reflection signals λ 3- λ 4 are transmitted to a2 nd secondary long-wave pass filter B2, the λ 3 signal changes the direction of an optical output signal to be horizontal output by a 3 rd prism C3 and is coupled into an optical fiber of a 3 rd collimator D3, the λ 4 signal is transmitted into a 4 th prism C4 by a2 nd reflector E2 and is coupled into an optical fiber of a 4 th collimator D4 after the light transmission direction is changed to be horizontal; the remaining λ 5- λ 6 signals are reflected to the 3 rd secondary long-wave pass filter B3 via the 4 th mirror E4, λ 5 and λ 6 are separated by thin-film interference, the λ 5 signal is transmitted to the 5 th prism C5 and further coupled to the 5 th collimator D5, and the λ 6 signal is transmitted to the 6 th prism C6 via the 3 rd mirror E3 and coupled to the optical fiber of the 6 th collimator D6 after changing the light transmission direction to be horizontal.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (8)
1. The utility model provides a unilateral output compact coarse wavelength division multiplexer which characterized in that: the device comprises a1 … n/2-1 st primary long-wave pass filter, a1 … n/2 nd secondary long-wave pass filter, a1 … n/2 nd, n/2+1 st reflector, a1 … n prism, an input collimator and a1 … n output collimator;
the optical signals with the wavelengths of lambda 1, lambda 2, lambda 3, lambda 4, … lambda n-1 and lambda n are input to the 1 st primary long-wave pass filter through the input collimator, the 1 st primary long-wave pass filter separates the optical signals with the wavelengths of lambda 1 and lambda 2 and transmits the optical signals to the 1 st secondary long-wave pass filter, and separates the optical signals with the wavelengths of lambda 3, lambda 4 … lambda n-1 and lambda n and transmits the optical signals to the 2 nd primary long-wave pass filter; the 2 nd primary long-wave pass filter separates out the optical signal with the wavelength of lambda 3, the lambda 4 is transmitted to the 2 nd secondary long-wave pass filter, and the optical signal except the lambda 1 … lambda 4 is separated and transmitted backward step by step, finally, the n/2 th-1 st primary long-wave pass filter separates out the optical signal with the wavelength of lambda n-1, the optical signal of lambda n is reflected to the n/2 nd secondary long-wave pass filter by the n/2+1 th reflector;
the 1 st secondary long wave pass filter separates the optical signal with the wavelength of lambda 1, the optical signal with the wavelength of lambda 2 changes the output direction through the 1 st prism and is horizontally output through the 1 st output collimator, and the 1 st secondary long wave pass filter separates the optical signal with the wavelength of lambda 2, the optical signal with the wavelength of lambda 2 is reflected by the 1 st reflector, the output direction is changed through the 2 nd prism and is horizontally output through the 2 nd output collimator;
the 2 nd secondary long wave pass filter changes the output direction of the optical signal with the wavelength of lambda 3 and horizontally outputs the optical signal through a 3 rd prism and a 3 rd output collimator, and the 2 nd secondary long wave pass filter changes the output direction of the optical signal with the wavelength of lambda 4 after being reflected by a2 nd reflector and then horizontally outputs the optical signal through a 4 th prism and a 4 th output collimator;
the 3 … n/2 th sub-longwave pass filter separates the wavelength optical signal output of the lambda 5 … lambda n and so on:
the optical signal with the wavelength of lambdan-1 separated by the n/2 th secondary long wave pass filter changes the output direction through the n-1 th prism and is horizontally output through the n-1 th output collimator, and the optical signal with the wavelength of lambdan separated by the n/2 th secondary long wave pass filter changes the output direction through the n prism after being reflected by the n/2 th reflector and is horizontally output through the n-1 th output collimator.
2. The single-side output compact coarse wavelength division multiplexer according to claim 1, wherein: the 1 st, 2 … n-1 st long wave pass filter is set obliquely, and the 1 st, 2 … n/2 nd long wave pass filter is set vertically.
3. The single-side output compact coarse wavelength division multiplexer according to claim 1, wherein:
the 1 st, 2 … n prism has an inclined bottom surface, and the length of the inner side surface connecting the inclined bottom surface is less than that of the outer side surface.
4. The single-side output compact coarse wavelength division multiplexer according to claim 3, wherein:
the optical signals of all wavelengths are refracted into horizontal optical signals through the inclined bottom surface of the prism and then output through the collimator.
5. The single-side output compact coarse wavelength division multiplexer according to claim 3, wherein:
the outer side surface of the 1 st, 3 rd, 5 th 5 … n-1 st prism is attached to the 1 st, 2 … n/2 nd secondary long wave pass filter.
6. The single-side output compact coarse wavelength division multiplexer according to claim 1, wherein:
the longitudinal arrangement position of the 1 … n/2 th reflector is parallel to the outer side surface of the 1 … n prism, and each transverse arrangement position of the reflector is positioned between two adjacent prisms.
7. The single-sided output compact coarse wavelength division multiplexer according to any one of claims 1-6, wherein: the 1 st 1 … n/2-1 primary long-wave pass filter, the 1 st 1 … n/2 secondary long-wave pass filter, the 1 st 1 … n/2, n/2+1 reflecting mirror, the 1 st 1 … n prism, the 1 st 1 … n output collimator, and n in the optical signals with the wavelengths of lambda 1, lambda 2, lambda 3, lambda 4, … lambda n-1 and lambda n are all even numbers.
8. The single-side output compact coarse wavelength division multiplexer according to claim 7, wherein:
when n is equal to 6, the 2 nd primary long wave pass filter separates the optical signal with the wavelength of lambda 5, the 4 th reflector reflects the optical signal with the wavelength of lambda 6 onto the 3 rd secondary long wave pass filter, the 3 rd secondary long wave pass filter separates the optical signal with the wavelength of lambda 5, the 5 th prism changes the output direction and the 5 th output collimator outputs horizontally, the 3 rd secondary long wave pass filter separates the optical signal with the wavelength of lambda 6, the 3 rd secondary long wave pass filter reflects the optical signal with the wavelength of lambda 6, the 6 th prism changes the output direction and the 6 th output collimator outputs horizontally.
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