Fujikura Limited

Other

Nippon Telegraph and Telephone Corporation

Fujikura Ltd. and Nippon Telegraph and Telephone Corporation

Yoshikazu Nomura

Kunihiko Fujiwara

Yukio Hayashi

Shinji Nagasawa

Masaaki Takaya

Yasuhiro Tamaki

Hiroshi Yokosuka

Nobuo Tomita

Hiroshi Furukawa

Hideyuki Hosoya

Naoki Nakao

Yoshihiro Ouchi

Mariko Asano

Kunihiko Jinbo

Koki Narita

Tohru Furukawa

An optical connector ferrule has an optical fiber containing hole reaching from the rear end surface near the end surface and a fine pore extending from the optical fiber accommodating hole to the end surface to be connected. A bare fiber of a polarization-maintaining optical fiber is inserted into the fine pore. Since the length of the fine pore is short, the influence of the uniformness of the adhesive in the fine pore is smaller, and therefore the stress distribution is maintained, resulting in stabilizing the polarization characteristics. A flange unit is attached to the ferrule after an optical fiber is inserted to the ferrule and fixed. Therefore the optical fiber is easily adjusted with respect to the housing in the circumferential direction around the axis, and optical fibers are connected by but joining with high accuracy.

Optical connector and assembling method for the same

The present invention is applied to a structure in which to attach a backplane connector to a backplane so that the backplane connector can be moved by a desired amount, a clip from which a pair of elastic pawls project is used to engage the backplane with the backplane connector through holes in the backplane. The present invention allows the clip of this structure to be removed efficiently. That is, the present invention provides a clip removing tool comprising disengaging pieces and that push in a pair of elastic pawls through an attaching slot in a backplane the elastic pawls being engaged with locking portions on opposite side portions of a BH housing are pushed, to disengage the elastic pawls from the locking portions as well as a clip removing method using this clip removing tool.

Clip removing tool and clip removing method

An optical connector that provides a housing body and a fixed part that are installed so as to hold a backplane , and connects an optical connector plug inserted into said housing body via an installation hole in said backplane and another optical connector plug inserted into said housing body from the direction opposite to that of said optical connector plug , wherein flexible claws projecting from both sides of said fixed part engage said housing body via said installation hole in said backplane , and thereby said backplane is held between said housing body and said fixed part . Simply by adjusting the floating range (amount of floating) of the flexible claws within said installation hole the floating range (amount of floating) of the housing body can be reliably set. Thereby, when the housing body engages the printed board housing, the dimensional error is offset reliably by the floating of the housing body , and the engagement is carried out smoothly. A special order part for setting the floating range of the housing body is not necessary, and thus a lower cost is possible and assembly can be carried out easily. In addition, a structure can also be used wherein the flexible claws projecting from the housing body side engage the backplane by passing through the installation hole, and the backplane is held between the bearing walls on the side of the housing body.

Optical connector

An optical connector that provides a housing body and a fixed part that are installed so as to hold a backplane , and connects an optical connector plug inserted into said housing body via an installation hole in backplane and another optical connector plug inserted into said housing body from the direction opposite to that of fixed part engage said housing body via said installation hole in said backplane , and thereby said backplane is held between said housing body and said fixed part . Simply by adjusting the floating range (amount of floating) of the flexible claws within said installation hole the floating range (amount of floating) of the housing body can be reliably set. Thereby, when the housing body engages the printed board housing, the dimensional error is offset reliably by the floating of the housing body , and the engagement is carried out smoothly. A special order part for setting the floating range of the housing body is not necessary, and thus a lower cost is possible and assembly can be carried out easily. In addition, a structure can also be used wherein the flexible claws projecting from the housing body side engage the backplane by passing through the installation hole, and the backplane is held between the bearing walls on the side of the housing body.

Connecting structure for optical connector

According to the present invention, an optical switch apparatus is provided for switching the connections between a plurality of fixed optical fibers which are fixed and arranged on an optical fiber support base within a container filled with an index-of-refraction matching agent, and movable optical fibers provided on a movable base which is moved by a moving mechanism comprising a worm gear within the aforementioned container. In addition, a worm gear driving member and a cam driving member of a matching device are both provided on the exterior of the aforementioned container via a seal. This worm gear driving member which is connected to a control device, starts the positioning sequence and moves the movable base to a standby position following return of the movable base to a predetermined origin within the container. As a result, it is possible to prevent contamination of the index-of-refraction matching agent over a long period of time, and thereby reduce the connection loss to a satisfactory level. In addition, since the driving precision of the movable base is also improved, it is possible to achieve superior effects such as reduction of the array pitch of the fixed optical fibers, improvement of the precision and increase in the multiplicity of the optical switch apparatus.

Optical switch apparatus

Optical switch

Growing community of inventors

Sakura, Japan

Yoshikazu Nomura