CN104749713A

CN104749713A - TOSA optical structure

Info

Publication number: CN104749713A
Application number: CN201310725377.9A
Authority: CN
Inventors: 吴砺; 张琥杰; 徐云兵; 王向飞
Original assignee: Photop Technologies Inc
Current assignee: Photop Technologies Inc
Priority date: 2013-12-25
Filing date: 2013-12-25
Publication date: 2015-07-01

Abstract

The invention discloses a TOSA optical structure which is characterized in that the structure comprises a laser group, a first coupling lens group, a multimode optical fiber array, a second coupling lens group, a scanning lens, an optical grating and a collimator, which are sequentially arranged along an optical path; the laser group, the first coupling lens group, the multimode optical fiber array and the second coupling lens group sequentially arranged along the optical path are composed of N groups of a laser, a first coupling lens, a multimode optical fiber and a second coupling lens which are sequentially connected along the optical path, wherein N is greater than or equal to 2; and the optical grating is arranged at the rear focus of the scanning lens. The TOSA optical structure of the invention has the beneficial effect that the contradiction between the large size of the lasers and the insufficient dispersion angle is solved by replacing the position of the lasers in the optical path with a smaller multimode optical fiber array, and the overall size of the TOSA optical structure is greatly reduced.

Description

A kind of TOSA optical texture

Technical field

The present invention relates to optical communication field, particularly a kind of TOSA optical texture.

Background technology

In optical communication field, the major function of light delivery module converts electrical signals to light signal, and light signal is converted to a kind of module of electric signal again.Be wherein light emission secondary module (TOSA) for converting electrical signals to the module of light signal, this light emission secondary module can convert electrical signals to light signal, and optical signal transmission is gone out.In prior art, TOSA optical texture ubiquity the comparatively large and dispersion angle of size not enough between contradiction.

Summary of the invention

For the problems referred to above, the object of the present invention is to provide a kind of by substituting larger laser instrument position in the optical path with less optical fiber head array, solve because of laser dimensions is comparatively large and dispersion angle not enough between contradiction, the TOSA optical texture of the overall dimensions of reduction of device greatly.

For achieving the above object, technical scheme proposed by the invention is: a kind of TOSA optical texture, is characterized in that: comprise the laser array, the first coupled lens group, multimode fiber array, the second coupled lens group, scanning lens, grating, the collimating apparatus that are arranged in order along light path; The laser instrument that described laser array, the first coupled lens group, multimode fiber array, the second coupled lens group be arranged in order along light path is connected along light path successively successively by N group, the first coupled lens, multimode optical fiber, the second coupled lens form, described N >=2, described grating is located at the back focus place of scanning lens.

Preferably, the multimode optical fiber in described multimode fiber array is along one-dimensional square to arrangement.

Adopt technique scheme, TOSA optical texture of the present invention, the beneficial effect had is: by substituting larger laser instrument position in the optical path with less multimode fiber array, solve because of laser dimensions is comparatively large and dispersion angle not enough between contradiction, greatly reduce the overall dimensions of TOSA optical texture.

Accompanying drawing explanation

Fig. 1 is TOSA optical texture schematic diagram of the present invention;

Wherein: 1. laser array, 11. laser instruments, 2. the first coupled lens group, 21. first coupled lens, 3. multimode fiber array, 31. multimode optical fibers, 4. the second coupled lens group, 41. second coupled lens, 5. scanning lens, 6. grating, 7. collimating apparatus.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention will be further described.

As shown in Figure 1, a kind of TOSA optical texture, comprises laser array 1, the first coupled lens group 2, multimode fiber array 3, second coupled lens group 4, scanning lens 5, grating 6, the collimating apparatus 7 that are arranged in order along light path; Laser instrument 11, first coupled lens 21 that described laser array 1, first coupled lens group 2, multimode fiber array 3, the second coupled lens group 4 be arranged in order along light path is connected along light path successively by N group, multimode optical fiber 31, second coupled lens 41 form, present embodiment is 4 groups, can arrange as required during concrete use, grating 6 is located at the back focus place of scanning lens 5.

During concrete use, the light beam that laser array is launched is by entering multimode fiber array after the first coupled lens group coupling, multimode fiber array upwards arranges at one-dimensional square, be connected with aforesaid laser instrument, what be worth proposition is, laser instrument arrangement is spatially unrestricted, only need ensure that the bending angle of optical fiber cable is not quite to affecting transmission performance.Multimode fiber array is again by after the second coupled lens group collimation, and light beam enters scanning lens, and scanning lens is placed between the second coupled lens group and grating, and the drop point of light beam on grating overlaps with the back focus of scanning lens.Therefore, the position of each multimode optical fiber in multimode fiber array determines incident angle when its emergent light incides grating surface, by Reasonable adjustment multimode fiber array, all light beams can be made identical through the angle of diffraction after grating, thus be coupled into a branch of, the light beam closing bundle receives rear output by collimating apparatus, thus realizes the function of TOSA.

Although specifically show in conjunction with preferred embodiment and describe the present invention; but those skilled in the art should be understood that; not departing from the spirit and scope of the present invention that appended claims limits; in the form and details the present invention is made a variety of changes, be protection scope of the present invention.

Claims

1. a TOSA optical texture, is characterized in that: comprise the laser array, the first coupled lens group, multimode fiber array, the second coupled lens group, scanning lens, grating, the collimating apparatus that are arranged in order along light path; The laser instrument that described laser array, the first coupled lens group, multimode fiber array, the second coupled lens group be arranged in order along light path is connected along light path successively successively by N group, the first coupled lens, multimode optical fiber, the second coupled lens form, described N >=2, described grating is located at the back focus place of scanning lens.

2. a kind of TOSA optical texture according to claim 1, is characterized in that: the multimode optical fiber in described multimode fiber array is along one-dimensional square to arrangement.