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Optical receptacle

An optical socket and inserted technology, applied in the direction of coupling of optical waveguides, can solve the problems of sensitivity deterioration and leakage on the receiving side, and achieve the effects of high reproducibility, improved reliability, and high connection loss.

Active Publication Date: 2009-01-21
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Thus, if Figure 18 As shown, in the case where the optical receptacle 74T for transmission and the optical receptacle 74R for reception are simultaneously fixed by the metal housing 25, the electrical signal driving the light-emitting element 20T passes through the optical receptacle 74T made of metal, leaks into the metal housing 25, and has an impact on the light-receiving element. 20R generates noise, so there is a problem that the sensitivity on the receiving side deteriorates
[0022] In addition, since the metal sleeve of the optical receptacle 74T on the transmitting side becomes an antenna to emit electromagnetic waves, the outer periphery of the optical communication transmitter and receiver needs to be shielded by forming a metal shield to prevent electromagnetic wave leakage. On the contrary, the metal sleeve of the optical receptacle 74R on the receiving side The sleeve picks up external noise, and there is also a problem that the sensitivity on the receiving side deteriorates, so it is necessary to improve the noise characteristics

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0057] Figure 1A It is a cross-sectional view showing the first embodiment of the present invention, and consists of the following components: a fiber post 1 for inserting and fixing an optical fiber in a ferrule 2; a holder 5 and a sleeve housing for fixing the rear end 17 of the fiber post 1 6; and the sleeve 4 used to keep the plug ferrule PF connected to the front end 18 of the fiber post 1, and the sleeve 4 is inserted and held on the front end 18 of the fiber post 1.

[0058] Here, the retaining ring 11 is formed by filling the overlapping outer peripheral side surfaces 19 of the fiber posts 1 of the sleeve 4 with resin. Thereby, the said sleeve 4 does not incline, and since it is an elastic body, it has the effect of reducing inclination.

[0059] Next, let the length of the sleeve 4 be L1, the overlapping length of the sleeve 4 and the fiber post 1 be L2, the overlapping length of the holder 5 and the fiber post 1 be L3, and the fiber post 1 and the retaining ring T...

no. 2 Embodiment approach

[0084] image 3 It is a cross-sectional view showing the second embodiment of the present invention, by inserting and fixing the optical fiber 3 in the fiber post 1 in the ferrule 2; fixing the holder 5 and the sleeve housing 6 at the rear end of the fiber post 1; The sleeve 4 is formed by holding the ferrule PF connected to the front end of the fiber post, and the front end 18 of the fiber post 1 is inserted into the sleeve 4 .

[0085] The sleeve 4 used at this time is as image 3 As shown, a thick portion 4a is formed. The outer diameter of the end portion inserted into and held by the fiber post 1 is processed into a trapezoidal shape, and its wall thickness is larger than that of the portion holding the plug ferrule PF. Thereby, the holding force of the thick part 4a can be improved.

[0086] In addition, the thickness of the thick portion 4 a is preferably 1.5 to 2.5 times the thickness of other portions. This is because if the thickness portion 4a is thinner than the...

no. 3 Embodiment approach

[0125] Figure 7 It is a cross-sectional view showing a third embodiment of the present invention. The precision sleeve 4 made of ceramic materials such as zirconia and alumina is fixed in the holder 5 of stainless steel with good weldability such as SUS304 by pressing. In addition, the metal flange 12 is press-fitted or adhesively fixed in the holder 5 without contact. Furthermore, a metallic ferrule stopper 13 is press-fitted and fixed to the inner diameter of the sleeve 4 .

[0126] Like this, through electric insulation flange 12 and clamper 5, when being used as the optical receptacle 7 of both sending and receiving of the optical module used in the optical transceiver, even if it is fixed by the metal case at the same time, it will not The following problems will occur: that is, the electrical signal driving the optical module for transmission also passes through the metal optical socket, leaks to the metal casing, and generates noise to the optical module for receptio...

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Abstract

An optical receptacle where a rear end portion of a fiber stub having an optical fiber in a through-hole of a ferrule is fixed to a holder and a sleeve for holding a plug ferrule is held at the fore-end portion of the fiber stub, wherein a holder ring is provided on an outer peripheral surface where the fiber stub and the sleeve are superposed. The structure realizes an optical receptacle shorter in length, improves connection loss relative to the inclination of the plug ferrule, and provides excellent reproducibility of connection loss.

Description

technical field [0001] The present invention relates to an optical socket used in optical communication modules and the like. Background technique [0002] An optical module for converting an optical signal into an electrical signal is configured by accommodating an optical element such as a semiconductor laser or a photodiode in a housing, and introducing or exporting an optical signal through an optical fiber (JP-A-11-240741, JP-A-2001-66468 ). [0003] Among the above-mentioned optical modules, the socket-type optical module composed of a connecting connector is used in Figure 14 The shown optical receptacle 70 is equipped with an optical element 20 at the rear, and a plug ferrule PF of an optical connector (SC connector) is connected to the front. [0004] like Figure 14 As shown, the above-mentioned optical socket 70 is composed of: a metal ring 82 made of ceramic materials such as zirconia and alumina, and a fiber post obtained by inserting and fixing an optical fib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/38G02B6/42
Inventor 伊藤宏树田中强松本俊之
Owner KYOCERA CORP