JP2862733B2 - Photoelectric conversion connection device and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure and a manufacturing method of a photoelectric conversion connection device used for optical communication.

[0002]

2. Description of the Related Art A refractive index distribution type lens and a ball have been used for a photoelectric conversion connection device for optical communication. In recent years, aspheric lenses have begun to be used to remove spherical aberration of these lenses to improve coupling efficiency and stabilize lens performance. In order to further improve the handleability of the lens, a lens barrel-integrated aspherical glass lens has been developed in which the lens barrel and the lens are integrally joined during press molding.

FIG. 3 shows a conventional example, in which 11 is a photoelectric conversion element, 12 is an elastic sleeve, 13 and 14 are holders, 15 and 16 are lens barrels, and 17 is a gradient index lens. The refractive index distribution type lens 17 is fixed to the lens barrel 15 by press-fitting or low-melting-point glass in order to improve handleability. The refractive index distribution type lens 17 has a large optical variation, and the optical axis direction is mechanically adjusted by sliding the lens barrel 15 with respect to the lens barrel end face D serving as an optical fiber stopper. After checking and adjusting the optical performance of some production lots, the lens barrel 15
And the lens barrel 16 are fixed by bonding. Then, the lens barrel 16 and the holder 14 are fixed at the joint surface Y3 by YAG welding. Next, another holder 13 incorporating the elastic sleeve 12 and the holder 14 are fixed at the joint surface Y4 by YAG welding to complete a receptacle with a lens. Furthermore, the photoelectric conversion element 11 driven in a state where an optical fiber (not shown) is inserted into the elastic sleeve 12 at a position where the optical fiber (not shown) abuts on the end face D is incorporated into the holder 14, and the optical axis is in contact with the holder 14. The photoelectric conversion element 11 and the holder 14 are fixed at the position where the optical connection efficiency is optimum by YAG welding at the joint surface Y5, and the optical fiber, the refractive index distribution type lens 17, and the photoelectric conversion element 11 are adjusted. Optical system is held and stabilized.

[0004]

However, even if partial improvements are made in the conventional configuration, the problem of adjusting the dispersion of the gradient index lens increases the number of parts and the number of steps for fixing these parts. There was a problem that there were many. Therefore, the present invention has been made to solve the above-described problems, and has as its object to realize a photoelectric conversion connection device with a minimum number of components and a minimum number of man-hours.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a receptacle in which an optical fiber ferrule is detachable.
Holder also serves as a receptacle and lens is integrally molded in the lens barrel
Lens with lens barrel, lens and optical fiber ferrule
And a photoelectric conversion element.
An optical fiber ferrule is provided in the lens barrel of the lens with the lens barrel.
Photoelectric conversion via the holder in the optical axis direction of the
Shape and a position regulation part that performs position restriction in the optical axis direction between換素Ko
And the photoelectric conversion with the lens with lens barrel by the holder
In a photoelectric conversion connection device configured to hold both elements
You.

[0006] Further , in the photoelectric conversion connection device having the above configuration,
The holding part with an elastic sleeve,
In the photoelectric conversion connection device supported by the cylinder.

Further , a lens with a lens barrel is fixed to a holder,
Move the photoelectric conversion element only in the direction perpendicular to the optical axis to
Adjust the connection efficiency with Iva and then use YAG welding
Photoelectric conversion connection device for fixing the photoelectric conversion element to the holder.
In the method of manufacturing the device.

[0008]

According to the present invention, a lens with a lens barrel is used as a part of an outer peripheral mold when a lens material is press-formed into a predetermined lens shape, and the inner surface of the lens barrel and the outer surface of the lens are brought into close contact by pressing pressure. Since the glass lens can be integrated, the handleability of the glass lens is improved. This lens barrel is given an outer periphery finish of several μm level in advance, and it also serves as a receptacle by positioning it in the optical axis direction based on it and positioning it in the direction perpendicular to the optical axis such that the focus position coincides with the end face of the lens barrel. It can be easily and accurately assembled in one holder.

The lens with the lens barrel is fixed to the holder, and then
By moving the photoelectric conversion element only in the direction perpendicular to the optical axis,
Adjust the connection efficiency with fiber and then use YAG welding
By fixing the photoelectric conversion element to this holder,
No adjustment and stable holding can be achieved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of an embodiment of the present invention showing a light emitting connection device in which an LED conforming to the FDDI standard is used as a photoelectric conversion element. Reference numeral 1 denotes a photoelectric conversion element using the LED element 1a as a light source, and a ball lens 1b on an upper surface of the LED element 1a.
And CAN1c and cover glass 1
d, sealed by base 1e. Reference numeral 2 denotes a stainless steel holder for maintaining a general guide of an optical fiber (not shown) and a mechanical strength of the apparatus. Reference numeral 3 denotes an elastic sleeve made of phosphor bronze or zirconia, which is finished to have a diameter slightly smaller than the ferrule at the tip of the optical fiber, so that an appropriate tightening force and holding force are generated when the optical fiber is inserted. Reference numeral 4 denotes a lens with a lens barrel in which the lens barrel 4b and the lens 4a are integrated during lens forming processing. The lens with a lens barrel 4 will be described with reference to FIG. A is an optical fiber stopper surface of the lens barrel 4b that regulates the optical axis direction when the optical fiber is inserted, and the ferrule of the optical fiber abuts.
Several μm so that the elastic sleeve 3 fits around the outer periphery of the lens barrel 4b.
An elastic sleeve guide portion B finished to an outer diameter accuracy of m is formed, and a diameter equal to or slightly smaller than the outer diameter of the ferrule is set as a reference value. The flange portion C of the lens barrel 4b regulates the elastic sleeve 3 in the optical axis direction and at the same time projects the position in the optical axis direction with the photoelectric conversion element 1 via the holder 2.
The planes do not have to be the same. At the time of forming the lens, one focal position F1 of the lens 4a is aligned with the contact surface A of the ferrule, and it is confirmed whether or not the dimension between the focal position F2 and the other focal position F2 is out. Check that the specified performance is achieved. Optical fiber core diameter and N.I. A, the aberration of the cover glass 1 d and the ball lens 1 b of the photoelectric conversion element 1, and the N.A. In consideration of A, etc., the use state and the design of the aberration-free may be intentionally shifted.

The elastic sleeve 3 is assembled into the lens 4 with the lens barrel thus designed and manufactured, and further inserted into the holder 2, and the lens barrel 4b and the holder 2 are fixed at the joint surface Y1 by YAG welding. Further, the optical fiber is inserted so as to contact the optical fiber stopper surface A in the elastic sleeve 3,
In this state, the photoelectric conversion element 1 is inserted and driven, adjusted in a direction perpendicular to the optical axis, and the photoelectric conversion element 1 and the holder 2 are joined at a position where the efficiency of connection between the photoelectric conversion element 1 and the optical fiber is appropriate. By fixing by YAG welding at Y2, a stable and high-performance optical system for photoelectric conversion is completed.

The present invention is not limited to the FDDI standard, but can be used in a single mode. Further, the optical system of all connection mechanisms including the SC and FC types having different locking portions and joining portions of connectors. Also applicable to

[0013]

According to the above-described photoelectric conversion connection device of the present invention, the optical axis of the optical fiber ferrule is attached to the lens barrel of the lens with the lens barrel.
Of the optical axis direction between the stopper part and the photoelectric conversion element
The lens holder and the light source are formed by the holder.
Since both elements are held,
The number and the number of fixing points can be reduced.
Position the lens, lens, and photoelectric conversion element in the optical axis direction.
It is possible to simplify assembly
Become.

Further, the holding portion of the optical fiber ferrule is elastic.
Formed with a sleeve, this elastic sleeve is used as a lens with a lens barrel
The structure of supporting the optical fiber ferrule
Common positioning reference in the axial direction and the direction perpendicular to the optical axis
It can be formed on the member of
It becomes possible.

A lens with a lens barrel and a photoelectric
Stable holding by incorporating and fixing both conversion elements
It is possible to process the lens barrel with high precision.
Therefore, it is possible to achieve no adjustment in the optical axis direction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a photoelectric conversion connection device showing one embodiment of the present invention.

FIG. 2 is a sectional view of a lens with a lens barrel.

FIG. 3 is a cross-sectional view of a conventional photoelectric conversion connection device.

[Explanation of symbols]

 Reference Signs List 1 photoelectric conversion element 2 holder 3 elastic sleeve 4 lens with lens barrel 4a lens 4b lens barrel A optical fiber stopper surface B elastic sleep guide

Claims (3)

(57) [Claims] An optical fiber ferrule-removable receptacle.
Holder also serves as a receptacle and lens is integrally molded in the lens barrel
Lens with lens barrel, lens and optical fiber ferrule
And a photoelectric conversion element.
The light of the optical fiber ferrule is provided in the lens barrel of the lens with the lens barrel.
A photoelectric conversion element via an axial stopper portion and the holder;
Forming a position regulating part that regulates the position of the optical axis with the device
And the holder and the photoelectric conversion element by the holder.
Photoelectric conversion connection device characterized by holding both
Place. 2. The method according to claim 1, wherein the holding portion is formed of an elastic sleeve.
A lens supported by a lens barrel with a lens barrel.
The photoelectric conversion connection device according to claim 1. 3. A photoelectric conversion device comprising: a lens with a lens barrel fixed to a holder;
Moving the switching element only in the direction perpendicular to the optical axis
The connection efficiency with the hose is adjusted, and then the
2. The photoelectric conversion element according to claim 1, wherein the photoelectric conversion element is fixed to a holder.
Manufacturing method of conversion connection device.