Nippon Telegraph and Telephone Corporation

Sumitomo Electric Industries, Limited

Other

The Furukawa Electric Co., Ltd.

Fujikura Limited

Shin-ichi Furukawa

Kazuo Hogari

Tomohiko Ueda

Yoshikyo Tamekuni

Akira Inoue

Kazuhiro Takizawa

Masumi Ito

Tomoyuki Yokokawa

Yoshiyuki Suetsugu

Yasuhiro Tamaki

Toru Iwashima

Hiroshi Yokosuka

Yoshiaki Miyajima

Toru Arikawa

Fumiki Hosoi

A short optical fiber,is incorporated in a ferrule,having a polished front end, so as to be projected from the rear end of the ferrule. In a base member,in which the short optical fiber is to be fitted into a hole,b, a V-groove,d to which the glass portion of an optical fiber is to be fixed, and a V-groove,e to which the coated portion is to be fixed are formed. A cover member,is placed on the base member. The base member,and the cover member,are clamped by clamp members,a and,b and the base member,presses to V-grooves. Wedges which are not shown are pressingly inserted between recessed,g and,c, and,h and,d, and an optical fiber,is inserted from the rear portion. Thereafter, the wedges are detached and the optical connector is attached to the terminal of the optical fiber

Optical connector and a method of attaching the same

An optical connector is provided where an biasing device,which biases a ferrule,having an optical fiber,secured thereinside and a tip end face,which has been polished, in a tip end face,direction, is located to the rear of a connection mechanism,for connecting the optical fiber,on the ferrule,side and a separately inserted optical fiber,at a rear end side of the ferrule,opposite to the front end face,The connection mechanism,has a construction which uses a mechanical splice, and is opened and closed by a release member inserted into an insertion opening,which is opened along an alignment axis direction. Hence the opening and closing operation does not interfere with the biasing device,so that operability is improved. Moreover, for this type optical connector there is provided an optical connector housing,which accommodates the ferrule. With this optical connector housing,by merely inserting the ferrule, the connection mechanism,for connecting the pair for optical fibers at the rear end side of the ferrule, and the stop ring,accommodating the connection mechanism,then assembly can be simply performed so that workability in assembling the optical connector is improved.

Optical connector and housing for optical connector

A spacer having a high-tensile member at the center thereof has grooves extending helically. Coated optical fibers have been disposed in each groove. This assembly is covered with a wound covering and further with a sheath. The proportion of the total sectional area of the coated optical fibers to the sectional area of each groove, i.e., the degree of packing, is regulated to 10 to 50%.

Spacer type optical fiber cable

A short optical fiber 2 is incorporated in a ferrule 1 having a polished front end, so as to be projected from the rear end of the ferrule. In a base member 3 in which the short optical fiber is to be fitted into a hole 3b, a V-groove 3d to which the glass portion of an optical fiber is to be fixed, and a V-groove 3e to which the coated portion is to be fixed are formed. A cover member 4 is placed on the base member. The base member 3 and the cover member 4 are clamped by clamp members 5a and 5b and the base member 3 presses the V-grooves. Wedges which are not shown are pressingly inserted between recesses 3g and 4c, and 3h and 4d, and an optical fiber 10 is inserted from the rear portion. Thereafter, the wedges are detached and the optical connector is attached to the terminal of the optical fiber 10.

An optical drop cable-units cable comprising a plastic pipe and a plurality of strandless optical drop cable-units and held in the plastics pipe, in which a space factor

Optical drop cable-units aggregate cable

The optical connector according to the present invention comprises, at least, an optical filter with a waveguide structure having a grating with a predetermined reflection wavelength and a plug attached to a tip of the optical filter. The grating is disposed at a tip portion of the optical filter and accommodated in the plug attached to the tip portion of the optical filter. Further, the optical connector has various light-blocking structures for preventing unnecessary light from traveling a filter region of the optical filter including the grating.

Optical connector

Growing community of inventors

Ibaragi, Japan

Shin-ichi Furukawa