CN208224530U - A kind of optical fiber circulator of compact type - Google Patents

Abstract

The utility model discloses a kind of optical fiber circulators of compact type, it includes the double-fiber collimator being set in sequence, optical wedge cornual plate, the first polarization splitting prism, Faraday rotator, half-wave plate, the second polarization splitting prism and single optical fiber calibrator, wherein, first polarization splitting prism, Faraday rotator, half-wave plate and the second polarization splitting prism are glued or optical cement is integral, the utility model is matched using special angle of the optical wedge cornual plate to double-fiber collimator, facilitates adjusting.Simultaneously, light beam loop core component is used as using polarization splitting prism (PBS), each light beam loop component is integral by optical cement or gluing unit, effectively reduce discrete component quantity, keep its structure more compact, ease of assembly, in addition, using the cramped construction of the utility model, the array type optical fiber circulator of arbitrary port may make up.

Description

A kind of optical fiber circulator of compact type

Technical field

The utility model relates to the optical passive component fields of light communication system, more particularly, to a kind of light of compact type Fine circulator.

Background technique

Optical fiber circulator is a kind of nonreciprocity optical passive component, and optical signal can be oriented to another end from a port by it Mouthful, one-way transmission is only carried out every time.When practical application, optical signal may be re-directed as needed, but optical signal must Each port must be passed sequentially through.There is very high isolation since its insertion loss is low, and to the optical power of input and reflection, Therefore optical fiber circulator is widely used in Fiber Optical Communication System.The optical fiber circulator characteristic nonreciprocal based on magneto-optical crystal, Using multiple discrete birefringece crystals or polarization splitting prism, the optical rotation plate of nonreciprocal optical rotation plate such as magneto-optical crystal, reciprocity It is quasi- to double optical fiber in conjunction with roof prism or birefringece crystal as half-wave plate constitutes leitungskern, then by single, double optical fiber collimator The angle of the crossing matching of straight device, to complete the function that optical signal is exported according to designated port coupling input.Product such at present, all It is based on multiple discrete optical element structures, such as prism, crystal, PBS, wave plate, then by each optical element installation position Set accurate adjusting, respectively fixed, cure package and etc. completion, assembling process is cumbersome, complex procedures, need to put into more artificial Operation is completed, production cost is also caused to be difficult to advanced optimize.

Summary of the invention

The case where based on the prior art, the purpose of this utility model is to provide a kind of each optical component is highly integrated and low Costization and can on traditional mode of production platform the compact type of batch micro operations optical fiber circulator.

In order to realize above-mentioned technical purpose, the technical solution adopted in the utility model are as follows:

A kind of optical fiber circulator of compact type comprising double-fiber collimator, the optical wedge cornual plate, being set in sequence One polarization splitting prism, Faraday rotator, half-wave plate, the second polarization splitting prism and single optical fiber calibrator, wherein described One polarization splitting prism, Faraday rotator, half-wave plate and the second polarization splitting prism are glued or optical cement is integral.

Further, the optical wedge cornual plate and the first polarization splitting prism gluing or optical cement are integral.

Further, the optical wedge cornual plate is that one piece of optical glass angle of wedge piece is constituted or by two pieces of mutually independent optics Glass wedge cornual plate is oppositely arranged composition, can be for one or two solely for calibrating double fiber optic collimator angle of the crossing optical wedge cornual plates Vertical optical glass angle of wedge piece can regard concrete technology and structural requirement and the glued integral or discrete tune of light beam loop core Section.

Further, the double-fiber collimator is the double-fiber collimator battle array that one or more double-fiber collimators are constituted Column.

Further, the single optical fiber calibrator is the single optical fiber calibrator battle array that one or more single optical fiber calibrators are constituted Column.

Using above-mentioned technical solution, the essential characteristic of the utility model is using PBS as polarized light splitting device, each light Department of the Chinese Academy of Sciences's part is highly integrated, realizes properties of product by special structure and light path design.It has been completely free of current similar product When carrying out polarization light processing for the dependence of crystalline material, can on traditional optical production platform batch micro operations.And it is each The integrated composition optical loop core of optical component has compact-sized, cost effective feature, advantageously reduces integral device Size, efficiently use system space, in addition, the design structure be equally applicable to production array type optical fiber circulator product.

Detailed description of the invention

Carry out the structure and optical path to the typical optical fiber circulator of this patent scheme with reference to the accompanying drawings and detailed description, It is illustrated the design philosophy of this patent.

Fig. 1 is that the utility model optical fiber circulator is positive/negative to light path schematic diagram；

Fig. 2 is array type optical fiber circulator schematic diagram.

Specific embodiment

As shown in Figure 1, the utility model includes the double-fiber collimator 1 being set in sequence, the polarization of optical wedge cornual plate 2, first Amici prism 3, Faraday rotator 4, half-wave plate 5, the second polarization splitting prism 6 and single optical fiber calibrator 7, wherein described One polarization splitting prism 3, Faraday rotator 4, half-wave plate 5 and the second polarization splitting prism 6 are integral by glued or optical cement.

As one of form of implementation, the optical wedge cornual plate 2 and the first polarization splitting prism 3 pass through glued or light Glue is integral.

Further, the optical wedge cornual plate 2 can be for one piece of optical glass angle of wedge piece composition or by two pieces independently of each other Optical glass angle of wedge piece be oppositely arranged composition.

Structure shown in Fig. 1 forms one 3 port circulator structures, optical path can refer to the corresponding dotted line with arrow of Fig. 1 and Solid line signal, the optical path of this structure are related to the change of polarization state, and wherein horizontal polarisation component Tp and vertical polarisation component Ts points It is not indicated with straight line and point.The light of the random polarization state inputted from fiber port 1 passes through collimation lens (i.e. double-fiber collimator 1) It after refraction, is incident on optical wedge cornual plate 2 from the horizontal by certain angle, after the refraction of the angle of wedge piece of special angle, enters It penetrates light and horizontal direction parallel is incident on polarization splitting prism, two kinds of plane of polarizations orthogonal polarization state Ts and Tp are in the inclined of faying face Reflection and transmission occur respectively on vibration spectro-film, transmission direction is mutually perpendicular to separate, and then passes through magneto-optical crystal (i.e. faraday Rotator 4), the plane of polarization of this two beams polarised light is rotated in the counterclockwise direction 45 degree, then again by being based on birefringece crystal material Half slide 5 of optically-active of matter, the polarization state of two beam polarised lights continue 45 degree of rotation in the counterclockwise direction again, hereafter, and when incidence Polarization state is compared, and the polarization state of two kinds of polarised lights respectively has rotated 90 degree, i.e. original Ts becomes Tp, and former Tp becomes Ts, using knot After the polarization beam splitter in conjunction face, Ts and Tp occur to reflect respectively and transmit, and are finally merged into a branch of random polarization and are optically coupled into list Optical fiber collimator 7 is simultaneously emitted from port 2.

The random polarization light incident from port 2, it is orthogonal that the polarization beam splitter in engaged face is decomposed into transmission direction Tp and Ts light, using optically-active half-wave plate 5, the plane of polarization of this two beams polarised light is along 45 degree of rotation counterclockwise, then using magnetic The plane of polarization of luminescent crystal (i.e. Faraday rotator 4), two beam polarised lights rotates clockwise 45 degree, hereafter, Tp and Ts light it is inclined Polarization state reduction is constant, and after the polarization beam splitter of faying face, Ts and Tp occur to reflect respectively and transmit, and finally and is merged into A branch of random polarization light meets the angle of the crossing of double-fiber collimator 1 and is coupled reception after the refraction of the angle of wedge block of special angle, It is emitted from port 3.

Based on structure shown in FIG. 1, expanded and extend into structure shown in Fig. 2 comprising by strip optical wedge cornual plate, The first polarization splitting prism, strip magneto-optical crystal, strip optically-active half-wave plate, the strip PBS of strip PBS composition are constituted The second polarization splitting prism sequentially optical cement or compose the loop core 8 of optical fiber circulator array, double-fiber collimator array 1, single optical fiber calibrator array 7 is arranged further in accordance with setting position shown in its corresponding diagram 1 and arranges at 8 both ends of loop core, by this Structure can realize the array type optical fiber circulator of arbitrary port number.

The above is the utility model embodiment, for the ordinary skill in the art, practical new according to this The introduction of type is descended to the mortal world in the situation for not departing from the principles of the present invention and spirit and is done according to present utility model application the scope of the patents Equivalent change, modification, replacement and variant, should all belong to the covering scope of the utility model.

Claims (5)

1. a kind of optical fiber circulator of compact type, it is characterised in that: it includes the double-fiber collimator being set in sequence, optics Angle of wedge piece, the first polarization splitting prism, Faraday rotator, half-wave plate, the second polarization splitting prism and single optical fiber calibrator, In, first polarization splitting prism, Faraday rotator, half-wave plate and the second polarization splitting prism are glued or optical cement is at one Body.

2. a kind of optical fiber circulator of compact type according to claim 1, it is characterised in that: the optics angle of wedge Piece and the first polarization splitting prism gluing or optical cement are integral.

3. a kind of optical fiber circulator of compact type according to claim 1 or 2, it is characterised in that: the optics Angle of wedge piece is constituted or is oppositely arranged by two pieces of mutually independent optical glass angle of wedge pieces for one piece of optical glass angle of wedge piece and constitutes.

4. a kind of optical fiber circulator of compact type according to claim 1, it is characterised in that: double optical fiber are quasi- Straight device is the double-fiber collimator array that one or more double-fiber collimators are constituted.

5. a kind of optical fiber circulator of compact type according to claim 1, it is characterised in that: the single fiber is quasi- Straight device is the single optical fiber calibrator array that one or more single optical fiber calibrators are constituted.