CN201892762U - Wavelength division multiplexing and demultiplexing optical component for CFP-LR4 - Google Patents

Wavelength division multiplexing and demultiplexing optical component for CFP-LR4 Download PDF

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Publication number
CN201892762U
CN201892762U CN2010205804317U CN201020580431U CN201892762U CN 201892762 U CN201892762 U CN 201892762U CN 2010205804317 U CN2010205804317 U CN 2010205804317U CN 201020580431 U CN201020580431 U CN 201020580431U CN 201892762 U CN201892762 U CN 201892762U
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optical
fiber
wavelength
optical fiber
array
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李伟龙
孙雨舟
常留勋
施高鸿
刘圣
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Innolight Technology Suzhou Ltd
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Innolight Technology Suzhou Ltd
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Abstract

The utility model relates to a wavelength division multiplexing and demultiplexing optical component for CFP-LR4, comprising a transmitting end, a receiving end, an optical mirror group, an optical fiber array and a shell, wherein the optical fiber array comprises a glass capillary tube, an input and output optical fiber and a duplexing optical fiber adapter; the glass capillary tube is a glass rod with an inner hole; one end of the input and output optical fiber is arranged in the inner hole of the glass capillary tube, and the other end of the input and output optical fiber is connected with the duplexing optical fiber adapter; the optical fiber array is arranged in the shell; the optical mirror group comprises a C lens and a band-pass filter; the C lens and the band-pass filter are combined to form a telecentric-optical system; optical signals transmitted from the transmitting end are focused by the optical mirror group; after being focused, the optical signals enter the optical fiber array for transmission; the optical signals with different wavelengths enter optical fiber for transmission after being coupled; and optical carriers with four types of wavelengths, which are transmitted by the optical fiber array, are separated by the receiving end, and the signals of the receiving end are restored. The wavelength division multiplexing and demultiplexing optical component is compatible to a process technology of the traditional optical receiving component, has higher reliability and is suitable for large-batch production.

Description

The wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4
Technical field
The utility model relates to the optical transceiver module of optical communication, relates in particular to the wavelength-division multiplex demultiplexing optical assembly of a kind of CFP-LR4 of being used for.
Background technology
Along with the light communication technology rapid development, the continuous lifting of transmission capacity, traditional transmission technology has been difficult to satisfy the requirement of transmission capacity and transmission speed.For the bandwidth resources that prevent core network occur not enough, (Institute of Electrical and Electronics Engineers IEEE) has formulated unified standard to 40Gbps under the P802.3ba engineering duty group and 100Gbps Ethernet to IEEE.Optical wavelength-division multiplex (Wavelength Division Multiplexing, WDM) system is one of effective scheme that makes full use of the optical fiber frequency range, it can transmit the signal of a plurality of different wave lengths simultaneously in an optical fiber, to improve transmission capacity and to reduce communication system cost.
The CFP multi-source agreement is intended to the started shooting insertion transceiver element that is used to enable 40Gbps and 100Gbps application program is defined, and comprises the Fast Ethernet (40GbE and 100GbE) of a new generation.The communication network that plug-in type CFP transceiver can be data communication and formation Ethernet core provides required superelevation bandwidth support.The CFP encapsulation can support different pieces of information and telecommunications to use the hot plug optical module of long-distance transmissions.
CFP-LR4 is the optical module that is used for long distance High-speed Ethernet (40GbE and 100GbE) transmission that satisfies the CFP encapsulation, its core component is a wavelength-division multiplex demultiplexing optical assembly, be used for that carrier signal with four road different wave lengths is coupled to that same optical fiber transmits or the light carrier of four kinds of different wave lengths is separated, further handle restoring signal by four road photoreceivers then.
Polytype wavelength-division multiplex demultiplexing optical assembly is arranged at present in practical application, comprising dielectric multi-layer optical thin film type optical filter, diffraction grating, Fiber Bragg Grating FBG and array waveguide grating (Arrayed Waveguide Grating, AWG) etc., wherein dielectric multi-layer optical thin film type optical filter can satisfy the requirement of the low-loss of wavelength-division multiplex demultiplexing optical assembly, high-isolation, and production cost is low, technology maturation, has obtained using widely.
The number of patent application wavelength-division multiplex demultiplexing optical assembly that has been 5905827 U.S. Patent Publication comprises optical frames group, fiber array and housing.Described optical frames group comprises globe lens and bandpass filter, described fiber array comprises institute's glass capillary and optical fiber, described housing comprises the first side shell, second side shell and the drain pan, has the inclination angle between the first side shell and the second side shell, makes light path be " it " font.When assembling, the wavelength-division multiplex demultiplexing optical assembly of this utility model need accurately adjust light path, gluing is fixed then since glue to be subjected to temperature effect bigger, light path has certain deviation, influence the optical assembly overall performance, and long-term reliability existing problems; The transmitting terminal of the wavelength-division multiplex demultiplexing optical assembly of this utility model and receiving end are " it " font to be arranged, and is difficult for satisfying the CFP encapsulation; The wavelength-division multiplex demultiplexing optical assembly of this utility model uses globe lens to carry out the light path coupling, and the insertion loss is big, and difficulty satisfies IEEE 802.3ba 40G./100G ethernet specification standard on main performances such as Output optical power, receiving sensitivity.Number of patent application is 5859717 United States Patent (USP) employing GRIN (graded index) light conducting path lens coupling, lower insertion loss is arranged, but cost is higher.
The utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, a kind of wavelength-division multiplex demultiplexing optical assembly of the CFP-LR4 of satisfying application requirements is provided, effectively solve existing wavelength-division multiplex demultiplexing optical assembly and insert that loss is big, reliability is relatively poor and be difficult for satisfying problem such as CFP encapsulation, thereby well adapt to the CFP-LR4 application requirements.
The purpose of this utility model is achieved through the following technical solutions:
The wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4, comprise transmitting terminal, receiving end, the optical frames group, fiber array and housing, the transmitting terminal laser array is connected with the optical frames group pattern, different interchannels connect by fiber array, the receiving end receiver array is connected with the optical frames group pattern, different interchannels connect by fiber array, characteristics are: described transmitting terminal comprises the laser array of the Coarse Wavelength Division Multiplexing wavelength of IEEE 802.3ba regulation, described receiving end comprises the detector array of the Coarse Wavelength Division Multiplexing wavelength of IEEE 802.3ba regulation, described fiber array comprises glass capillary, input-output optical fiber and duplexing fiber adapter, glass capillary is the glass bar that an endoporus is arranged, input-output optical fiber one end places in the endoporus of glass capillary, the input-output optical fiber other end is connected with the duplexing fiber adapter, and fiber array places enclosure interior; Described optical frames group comprises C lens and bandpass filter, and the C lens combine with bandpass filter and constitute telecentric optical system; The light signal that described transmitting terminal sends focuses on by the optical frames group, light signal after the focusing enters fiber array and transmits, wavelength optical signals is transmitted through being coupled into optical fiber, by receiving end the light carrier of four kinds of wavelength of fiber array transmission is separated the receiving end restoring signal.
Further, the above-mentioned wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4, described enclosure interior is provided with the locating slot that is used for fixing optical fiber.
Further, the above-mentioned wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4, described C lens and glass capillary end face all are coated with anti-reflective film.
Further, the above-mentioned wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4, described duplexing fiber adapter are SC type duplexing fiber adapter or LC type duplexing fiber adapter.
Again further, the above-mentioned wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4, described enclosure interior is provided with the round fiber guide rail, and the guide rail internal diameter is the low-loss minimum bending radius of fiber array.
The substantive distinguishing features of technical solutions of the utility model and progressive being mainly reflected in:
The utility model modern design, fiber array is positioned at enclosure interior, constant bending radius is arranged, good reliability; Adopt the C lens to replace traditional globe lens and grin lens, reduced the insertion loss, reduced cost; C lens and bandpass filter constitute telecentric optical system, have had the insertion loss very low, and the angle that incides bandpass filter is 1.8 °, effectively improve the bandpass filter performance, have reduced the bandpass filter cost; The accurate adjusted fixation procedure of light path is used laser bonding, and temperature influence is very little, and reliability is very high; Whole assembling process is simple, can use the making technology of existing light transmitting-receiving subassembly, is fit to produce in enormous quantities.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Fig. 1: the structural representation of the utility model wavelength-division multiplex demultiplexing optical assembly;
Fig. 2: fiber array structural representation of the present utility model;
Fig. 3: the inner structure synoptic diagram of housing of the present utility model;
Fig. 4: the penetrating family curve of bandpass filter of the present utility model;
Fig. 5: the first input channel light path work synoptic diagram of the present utility model;
Fig. 6: the 4th output channel light path work synoptic diagram of the present utility model;
Fig. 7: the package assembly synoptic diagram of transmitting terminal receiving end, optical frames group, fiber array;
Fig. 8: the second embodiment enclosure interior structural representation of the present utility model;
Fig. 9: the second embodiment fiber array structural representation of the present utility model.
The implication of each Reference numeral sees the following form among the figure:
Figure BSA00000321816200041
Embodiment
The wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4, as shown in Figure 1, comprise transmitting terminal 1, receiving end 2, optical frames group 3, fiber array 4 and housing 5, the transmitting terminal laser array is connected by laser bonding with the optical frames group pattern, different interchannels connect by fiber array, finish complete signal and send; The receiving end receiver array is connected by laser bonding with the optical frames group pattern, and different interchannels connect by fiber array, finishes complete signal and receives.Transmitting terminal 1 comprises the Coarse Wavelength Division Multiplexing wavelength X of IEEE 802.3ba regulation 1λ 2λ 3λ 4Laser array.The light signal that transmitting terminal 1 sends focuses on by optical frames group 3, enters fiber array 4 and transmits, and wavelength optical signals is transmitted through being coupled into an optical fiber; Receiving end 2 comprises the Coarse Wavelength Division Multiplexing wavelength X of 802.3ba regulation 1λ 2λ 3λ 4Detector array, with four kinds of wavelength X of fiber array transmission 1λ 2λ 3λ 4Light carrier separate, then by the further processing restoring signal of corresponding receiving end.
Fiber array as shown in Figure 2, comprise input-output optical fiber 41 and glass capillary 42, glass capillary 42 is for there being the glass bar of an endoporus, and an end of input-output optical fiber 41 places respectively in the endoporus of glass capillary 42, and the other end is connected with SC type duplexing fiber adapter 43.Input-output optical fiber 41 comprises first optical fiber 411, transmission wavelength λ 1Second optical fiber 412, transmission wavelength λ 1λ 2The 3rd optical fiber 413, transmission wavelength λ 1λ 2λ 3The 4th optical fiber 414, transmission wavelength λ 1λ 2λ 3λ 4
The enclosure interior structure as shown in Figure 3, the optical fiber guide rail that it is R that there is an internal diameter housing 5 inside, radius R are the minimum bending radius of fiber array 4, when the bending radius of optical fiber during greater than R, bending loss of optical fiber is very little.Fiber array 4 places enclosure interior to have very high reliability.The guide rail space is bigger, can tolerate bigger fiber lengths error, has effectively reduced the manufacture difficulty of fiber array, is fit to produce in enormous quantities.
As shown in Figure 5, be the first input channel light path work synoptic diagram, wherein bandpass filter 32 is a Thin Film Filter, its penetrating family curve as shown in Figure 4, by fiber array 4 incidents by the different optical multiplexed signal of wavelength with the λ that forms 1λ 2λ 3λ 4Incident optical signal is collimated into directional light through C lens 31 and incides bandpass filter 32, and incident angle is 1.8 °, and wavelength is λ 1Transmittance enter receiving end 2, other wavelength signals λ 2λ 3λ 4Reflect into into the fiber array transmission, realize the demultiplexing function.Rest channels by that analogy.
As shown in Figure 6, be the 4th output channel light path work synoptic diagram, wherein bandpass filter 32 is a Thin Film Filter, its penetrating family curve as shown in Figure 4, by fiber array 4 incidents by the different optical multiplexed signal of wavelength with the λ that forms 1λ 2λ 3Incident optical signal is collimated into directional light through C lens 31 and incides bandpass filter 32, and incident angle is 1.8 °, λ 1λ 2λ 3Incident light is not in the passband of bandpass filter 32, and all reflected back C lens focus on and enter the fiber array transmission, and simultaneously, the wavelength that transmitting terminal 1 sends is λ 4Light signal by the C lens focus, with λ 1λ 2λ 3Reflected light coupling enter same Optical Fiber Transmission, realize multiplexing function.Rest channels by that analogy.
C lens 31 and bandpass filter 32 relative positions satisfy appropriate relation, constitute telecentric optical system, very low insertion loss is arranged, and 3 pairs of fiber array 4 distance and positions of optical frames group are insensitive, easy to adjust.The incident angle that light signal incides bandpass filter 32 is 1.8 °, effectively improves the bandpass filter performance, has reduced the bandpass filter cost.Simultaneously, C lens 31 all are coated with anti-reflective film with glass capillary 42 end faces, can reduce the insertion loss of system, reduce the infringement of reflected light to system.
As shown in Figure 7, the assemble method of transmitting terminal, receiving end, optical frames group, fiber array, at first fiber array 4 is placed among the optical fiber guide rail of housing 5, glass capillary 42 has an end to place housing 5 outsides, puts the kapillary collar 64 at glass capillary 42 outer walls; Then, optical frames group 3 is placed the mirror group collar 62, connects the optical frames group 3 and the kapillary collar 64 with metallic adjusted ring 63,, by changing the relative position of metallic adjusted ring 63, reach the purpose of adjusting light path; The then light path use laser bonding formed of the optical frames group that will adjust and glass capillary, fixed light path; Then transmitting terminal 1 is placed in the collar 61, with transmitting terminal 1 and the collar 61 welding, adjust the relative position of transmitting terminal 1 and optical frames group 3, use the laser bonding fixed light path with electric resistance welding; Perhaps receiving end 2 is placed in the collar 61, adjust the relative position of receiving end 2 and optical frames group 3, fix with epoxy resin.
Second embodiment: duplexing fiber adapter model is changed into the LC type from the SC type, and LC type fiber adapter 44 has rotated 45 degree simultaneously.This embodiment is compared with first kind of packing forms (SC type) for second kind of packing forms of CFP multi-source agreement regulation, and second kind of needs connector is the LC type, and rotates 45 degree.This mode is more suitable for application in practice.
The enclosure interior structure as shown in Figure 8, housing 5 left sides are receiving end fiber array 4 locating slots, right-hand part is transmitting terminal fiber array 4 locating slots.It is the optical fiber guide rail of R that there is an internal diameter housing 5 left sides, and radius R is the minimum bending radius of fiber array 4, and when the bending radius of optical fiber during greater than R, bending loss of optical fiber is very little.Because transmitting terminal fiber array slightly bending loss does not influence wavelength-division multiplex demultiplexing optical assembly overall performance,, save the space so right-hand part transmitting terminal optical fiber guide rail radius is diminished.Simultaneously, fiber array 4 places enclosure interior to have very high reliability.The guide rail space is bigger, can tolerate bigger fiber lengths error, has effectively reduced the manufacture difficulty of fiber array, is fit to produce in enormous quantities.
The fiber array structure as shown in Figure 9, comprise input-output optical fiber 41 and glass capillary 42, glass capillary 42 is for there being the glass bar of an endoporus, and an end of input-output optical fiber 41 places respectively in the endoporus of glass capillary 42, and the other end is connected with LC type duplexing fiber adapter 44.Input-output optical fiber 41 comprises first optical fiber 411, transmission wavelength λ 1Second optical fiber 412, transmission wavelength λ 1λ 2The 3rd optical fiber 413, transmission wavelength λ 1λ 2λ 3The 4th optical fiber 414, transmission wavelength λ 1λ 2λ 3λ 4
In sum, the utility model is used for the wavelength-division multiplex demultiplexing optical assembly of CFP-LR4, compare with traditional wavelength-division multiplex demultiplexing optical assembly, has higher reliability, the insertion loss is little, cost is low, finely on main performances such as Output optical power, receiving sensitivity satisfies IEEE 802.3ba40G/100G ethernet specification standard, on external form with CFP multi-source agreement standard compatibility.Whole assembling process is simple, with the making technology compatibility of existing light transmitting-receiving subassembly, is fit to produce in enormous quantities.
What need understand is: the above only is a preferred implementation of the present utility model; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (5)

1. the wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4, comprise transmitting terminal, receiving end, the optical frames group, fiber array and housing, the transmitting terminal laser array is connected with the optical frames group pattern, different interchannels connect by fiber array, the receiving end receiver array is connected with the optical frames group pattern, different interchannels connect by fiber array, it is characterized in that: described transmitting terminal comprises the laser array of the Coarse Wavelength Division Multiplexing wavelength of IEEE 802.3ba regulation, described receiving end comprises the detector array of the Coarse Wavelength Division Multiplexing wavelength of IEEE 802.3ba regulation, described fiber array comprises glass capillary, input-output optical fiber and duplexing fiber adapter, glass capillary is the glass bar that an endoporus is arranged, input-output optical fiber one end places in the endoporus of glass capillary, the input-output optical fiber other end is connected with the duplexing fiber adapter, and fiber array places enclosure interior; Described optical frames group comprises C lens and bandpass filter, and the C lens combine with bandpass filter and constitute telecentric optical system; The light signal that described transmitting terminal sends focuses on by the optical frames group, light signal after the focusing enters fiber array and transmits, wavelength optical signals is transmitted through being coupled into optical fiber, by receiving end the light carrier of four kinds of wavelength of fiber array transmission is separated the receiving end restoring signal.
2. the wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4 according to claim 1, it is characterized in that: described enclosure interior is provided with the locating slot that is used for fixing optical fiber.
3. the wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4 according to claim 1, it is characterized in that: described C lens and glass capillary end face all are coated with anti-reflective film.
4. the wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4 according to claim 1 is characterized in that: described duplexing fiber adapter is SC type duplexing fiber adapter or LC type duplexing fiber adapter.
5. the wavelength-division multiplex demultiplexing optical assembly that is used for CFP-LR4 according to claim 1, it is characterized in that: described enclosure interior is provided with the round fiber guide rail, and the guide rail internal diameter is the low-loss minimum bending radius of fiber array.
CN2010205804317U 2010-10-28 2010-10-28 Wavelength division multiplexing and demultiplexing optical component for CFP-LR4 Expired - Lifetime CN201892762U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102347803A (en) * 2011-10-13 2012-02-08 苏州旭创科技有限公司 Wavelength division multiplexing and demultiplexing optical component used for 40G 40km long-distance transmission
CN104040403A (en) * 2011-09-12 2014-09-10 蒂科电子公司 Bend-limited flexible optical interconnect device for signal distribution

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104040403A (en) * 2011-09-12 2014-09-10 蒂科电子公司 Bend-limited flexible optical interconnect device for signal distribution
CN102347803A (en) * 2011-10-13 2012-02-08 苏州旭创科技有限公司 Wavelength division multiplexing and demultiplexing optical component used for 40G 40km long-distance transmission

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Granted publication date: 20110706