CN201229418Y - Plane optical waveguide splitter - Google Patents

Abstract

The utility model relates to a flat optical waveguide shunt, which is characterized by comprising an outer shell, an optical array, an optical beam, a chip and a single optical fiber, wherein the chip is arranged inside the outer shell and is butted with the optical array through UV adhesive, one end of the optical fiber array is connected with the optical beam and is educed outside the outer shell, the other end is connected with the optical fiber and is educed outside the outer shell. The utility model has the advantages that depletion is insensitive to the wavelength of the transmission light and can satisfy the transmission requirements of different wave lengths, the light splitting is uniform, which can uniformly distribute the signals to users, the structure is compact, the volume is small and the shunt can be directly installed in various existing cable distribution boxes without the special design of remaining a large mounting space, a single device has a plurality of branch channels, whose number can reach more than thirty-two.

Description

A kind of planar optical waveguide splitter

Technical field

The utility model relates to a kind of planar optical waveguide splitter, can realize that 1 * N from the local side to user connects, and is used for telecommunication network route, cable television network, user loop system, local-area network, belongs to light passive component field,

Background technology

Fiber to the home, also claims FTTH (Fiber to The Home), refers to optical network unit is installed in domestic consumer or enterprise customer place.The remarkable technical characterstic of FTTH is the bandwidth that not only provides bigger, and has strengthened the transparency of network to data form, speed, wavelength and agreement, has relaxed requirements such as environmental baseline and power supplies, simplified according to and working service.

People increase considerably the demand of multimedia application such as remote teaching, tele-medicine, video conference, and ecommerce is the typical focus of network application especially.Simultaneously, people also have higher requirement to the network bandwidth and speed, impel network by low speed at a high speed, by sharing to exchange, developing rapidly to the broadband direction by the arrowband.

FTTH has begun in the international market to obtain fairly large commercialization and present bright development prospect at present, and FTTH builds has had considerable scale in many countries.

Japan is that Fiber to the home in the world and uses the most universal country.Japanese government is considered as the advanced degree sign of national information with fiber-to-the-home popularity, and has formulated and implemented the strategy of " e-Japan " and " u-Japan ", and target is built hypervelocity network infrastructure and encouraged competition.By in Dec, 2006, Fiber to the home has reached 7,200,000 families in Japan, will make at least 3,000 ten thousand families can use that Fiber to the home inserts the internet at a high speed by 2012.

Korea S is just clinging to Japan's Fiber to the home paces on one's trail, and the slogan of Korea S is " e-Korea ".Korea S plans 2010 Fiber to the home that popularity rate will be above 70%.

The tw Taiwan is in beginning Fiber to the home pilot in 2004.Be estimated as 2,060,000 families in 2007, invested 4,000 hundred million dollars by Hinet and will enlarge fiber-to-the-home applying in 2008.

Europe begins deployed fiber very early to the family, and 2004, Europe Fiber to the home association set up, and European Union's Information Committee proposes to build the plan " i2010 " of the European information economy society of an agreement.At present existing 100 general-purpose families realize that Fiber to the home.

The U.S. Fiber to the home forum and telecommunications industry association (TIA) will be united declaration the end of the year 2006, Fiber to the home in the North America, and the user covers number has broken through 6,000,000 families, only increases nearly 2,000,000 families in 2006 1 year.The U.S. will Fiber to the home engineering as the extension of national information highway strategy.

This shows that global developed country all includes the development plan of informatization national strategy in Fiber to the home.

Though compare with other countries in the world, China FTTH industry progress is slow relatively, has begun to show bright development prospect.China telecom operators are more and more denseer to development FTTH interest, and the FTTH pilot has all been carried out one after another as Wuhan, Hangzhou, Shanghai etc. in the many areas of China at present.By 2006, Wuhan FTTH user reached more than 10,000 families.In addition, in order successfully to host the Olympic Games, Beijing Olympic organizing committee announces, will invest 6,600,000,000 dollars of expansions and upgrading communication network before 2008, and Beijing will may realize that Fiber to the home fully when the time comes.At present seven provinces such as Jiangsu externally announce, will apply that Fiber to the home across the entire province.And World's Fair will be held in Shanghai in 2010, and the demand of FTTH is declined with sample prescription Xing Wei.

Along with the investment orientation of optical fiber communication is developed by the direction to FTTH, FTTP such as communication trunk, Metropolitan Area Network (MAN), LAN (Local Area Network), private, also arrive the spring in the core light device of FTTH---optical branching device market thereupon, the continuous expansion of the market demand, consistent this market of having an optimistic view of of optical device producer both at home and abroad.

Optical fiber splitter (Coupler) claims splitter (Splitter) again, as the core light device in the FTTH network, can realize that 1 * N from the local side to user connects.Belong to light passive component field, in telecommunication network route, cable television network, user loop system, local-area network, all can be applied to.

Optical branching device mainly contains two types at present: a kind of is the fused biconical taper formula optical fiber splitter that adopts traditional optical passive component manufacturing technology (drawing taper coupling method) to produce; Another kind is planar optical waveguide (PLC) shunt that adopts integrated optics technique to produce.

(Planar Lightwave Circuit PLC) is the important basic parts of integrated optics to planar optical waveguide, and it can be with light beam in the medium of optical wavelength magnitude size, the radiationless transmission of long distance.The planar type optical waveguide optical device is called photonic integrated device again.Its core is to adopt integrated optics technology to make various planar optical waveguides according to functional requirement, have also will be on certain position depositing electrode, then optical waveguide again with optical fiber or fiber array coupling, be the research focus of multiclass optical device.

The plane light wave waveguide technology is to make optical waveguide branch device---planar optical waveguide splitter (PLC Splitter) with semiconductor technology, and function is integrated on the chip along separate routes, just realizes shunt more than 1 * 32 on a chip; Then, be coupled respectively at the chip two ends multichannel light fibre array of encapsulation input end and output terminal.

Fused biconical taper optical fiber splitter (Fused Fiber Splitter)

The fused biconical taper technology is that two or multifiber are tied together, drawing fusion drawn on the awl machine then, and monitoring the variation of splitting ratio in real time, splitting ratio finishes fusion drawn after reaching requirement, wherein an end keeps an optical fiber (all the other are cut) as input end, and the other end is then made multi-channel output.Maturation draws awl technology once can only draw below 1 * 4 at present, and 1 * 4 above device then uses a plurality of 1 * 2 to link together, and overall package is in the shunt box again.

The loss of fused biconical taper formula optical fiber splitter is comparatively responsive to the wavelength of light signal, generally to select device for use according to wavelength, in the unification of three nets of FTTH, be critical defect, because multi-wavelength's signals such as 1310nm, 1490nm, 1550nm are arranged at the light signal of unification of three nets transmission.Have now and be known as " all band is drawn tapered shunt ", its actual wave band that effectively uses is generally 1310 ± 50,1490 ± 10,1550 ± 10 segmentation wavelength period, and characteristic is relatively poor, can not satisfy the request for utilization of FTTH network.

Its effective practical wave band of PLC shunt is 1260～1650nm, on all band of this communication wavelengths, the PLC shunt has good loss output characteristics, loss is insensitive to wavelength, characteristic is good, satisfy the FTTH requirement, and the close wavelength-division multiplex technology of communication dilatation after can be provides good support comprehensively.

The PLC shunt is almost all adopted in Japan and the real commercial off-the-shelf of North America FTTH market.

A. loss homogeneity between port

Homogeneity between fused biconical taper formula optical fiber splitter port is relatively poor, can not guarantee even beam split, and along with the increase of port number, its homogeneity is phase strain differential (1 * 32 usually at 3.0dB) also, influences the transmission range of optical communication network.

The PLC shunt has been because its chip has guaranteed even beam split when waveguide design, and ripe packaging technology has guaranteed that final PLC shunt has loss homogeneity between good port (1 * 32 can at 1.0dB once).

B. Polarization Dependent Loss (PDL)

The Polarization Dependent Loss (PDL) of fused biconical taper formula optical fiber splitter is big (1 * 32 usually at 0.6dB), has influenced the transmission range of optical communication network.

The PLC shunt is because its operational characteristic, and good PDL is provided (1 * 32 can below 0.3dB), satisfies the long Distance Transmission requirement of FTTH.

C. temperature correlation loss (TDL)

The temperature correlation loss (TDL) of fused biconical taper formula optical fiber splitter is big (at-20 ℃～75 ℃, 1 * 32 TDL is usually at 1.0dB), can not satisfy open-air harsh service condition.

The PLC shunt has good TDL, have than the wideer temperature usable range of fused biconical taper formula optical fiber splitter and better TDL (at-40 ℃～85 ℃, 1 * 32TDL is usually below 0.5dB), satisfy open-air harsh service condition, for the FTTH network provides good support comprehensively.

D. the volume ratio of shunt

The volume of fused biconical taper formula optical fiber splitter is bigger.Port number is many more, and volume is big more, and dependability reduces, and installing space obtains restriction.

PLC shunt compact conformation, volume is less, can be directly installed in the existing various cross-connecting box, does not need particular design to reserve very big installing space.

But at present, planar optical waveguide splitter (PLC Splitter) is import, and it costs an arm and a leg.

Summary of the invention

The purpose of this utility model provides a kind of planar optical waveguide splitter of production domesticization.

For realizing above purpose, the technical solution of the utility model provides a kind of planar optical waveguide splitter, it is characterized in that, be made up of shell, fiber array, fibre bundle, chip and simple optical fiber, chip is located in the shell, docks with fiber array by ultraviolet glue, fiber array one end is connected with fibre bundle, and draw shell, the other end is connected with simple optical fiber, and draws shell.

The utility model adopts the automatic core-adjusting instrument, to the full-automatic accent core butt joint of PLC shunt encapsulation, thereby guarantees to the utlity model has extremely low insertion loss, outstanding branch optical uniformity and long-term stability.The utility model by the test in-40 ℃～+ 85 ℃ harsh like this high and low temperature environments and high humility in nearly 2000 hours, reaches the international quality standards requirement substantially.

The utility model has the advantages that:

(1) loss is insensitive to optical wavelength transmission, can satisfy the transmission needs of different wave length;

(2) beam split is even, can give the user with the signal uniform distribution;

(3) compact conformation, volume little (1 * 32 size: 4 * 7 * 50mm), can be directly installed in the existing various cross-connecting box, do not need particular design to reserve very big installing space;

(4) single device divided channel is a lot, can reach more than 32 the tunnel;

(5) the multichannel cost is low, divides way many more, and cost advantage is obvious more.

Description of drawings

Fig. 1 is a kind of planar optical waveguide splitter structural representation.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment

As shown in Figure 1, be a kind of planar optical waveguide splitter structural representation, a kind of planar optical waveguide splitter is characterized in that, form by shell 1, fiber array 2, fibre bundle 3, chip 4 and simple optical fiber 5, chip 4 is located in the shell 1, docks with fiber array 2 by ultraviolet glue, and fiber array 2 one ends are connected with fibre bundle 3, and draw shell 1, the other end is connected with simple optical fiber 5, and draws shell 1, and described chip 4 is a PLC Splitter chip.

During use, can be directly installed in the existing various cross-connecting box, one main light source gone out by the light path that shunt is divided into 1-N part, and the light path of 1-N part is synthesized 1 bundle main light source by shunt reclaim, in single-mode fiber light conducting signal, the energy of light not exclusively is to concentrate in the fibre core to propagate also, have is by propagating near in the covering of fibre core on a small quantity, that is to say, words at the fibre core close enough of two optical fiber, the mould field of the light that transmits in an optical fiber just can enter an other optical fiber, and light signal obtains distribution again in two optical fiber.

Claims (1)

1. planar optical waveguide splitter, it is characterized in that, form by shell (1), fiber array (2), fibre bundle (3), chip (4) and simple optical fiber (5), chip (4) is located in the shell (1), dock with fiber array (2) by ultraviolet glue, fiber array (2) one ends are connected with fibre bundle (3), and draw shell (1), the other end is connected with simple optical fiber (5), and draws shell (1).

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