JPH01200208A - Optical semiconductor module - Google Patents

Abstract

PURPOSE:To accurately arrange optical parts and to miniaturize a device by sticking ferromagnetic bodies to respective bottoms of a terminal member and plural holding members. CONSTITUTION:An optical fiber 101 is inserted to a through hole 102 of a terminal member 103 and is fixed with an epoxy adhesive 104, and an end face 113 of the terminal member 103 is sufficiently flattened for the purpose of improving matching of the member 103 to a storage member 105, and the member 103 is provided with a collar to facilitate projection of a light beam, and a permanent magnet 111 is stuck to the bottom of the end face 113. A holding member 108 supporting a light emitting and receiving element 106 and a holding member 109 to which a light coupling lens 107 to the optical fiber 101 is fixed are provided in the member 105. Permanent magnets 112 are stuck to bottoms of end faces 114 of members 108 and 109. Members 103, 108, and 109 are arranged in optical relative positions and are strongly attracted and fixed to the storage member 105 consisting of a ferromagnetic body by magnets 111 and 112.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a four-body module, and more particularly to an optical semiconductor module optically coupled to a source fiber.

[Conventional technology]

In this type of optical semiconductor module, it is necessary to accurately maintain the relative position between the primary fiber and the applied optical system in order to achieve optimal optical coupling to the primary fiber.

Conventional means for joining a terminal member for fixing a single-element fiber and a housing member for housing a lens for single-coupling light emitting/receiving elements, and a first holding member for fixing a light emitting/receiving element and a lens for optical coupling. The means for joining the second holding member and the inside of the storage member is epoxy adhesive, solder, or Yag (
YAG) laser bathing was used. but,
Bonding strength for fixing methods such as epoxy adhesive or solder.

Since there are problems with heat resistance 1 and workability, recently laser welding means have been widely introduced.

By the way, when laser welding is applied, the melting and fixing positions of relatively small parts such as end members for fixing optical fibers and holding members for lenses etc. shift during irradiation and bath melting, making it difficult to place them in the correct position. The problem is that it can't be done.

As a method for preventing this displacement of the bath melting part, a method has been conventionally practiced in which a holding member or the like is held or supported by dynamic force using a υ4 type means as a jig. However, this method also has problems, so it is necessary to review the structure of the holding member and the like.

[Problem to be solved by the invention]

Next, problems with conventional optical semiconductor modules that overuse the above-mentioned laser welding means will be described.

The problem with 5I41 is that positional deviation occurs during irradiation melting and fixation, making it impossible to accurately place the parts.The 20th problem is that the optical semiconductor module cannot be made smaller by supporting or holding it using mechanical means such as adjustment means. It is.

The first problem is caused by the uniqueness of the laser bath contacting means itself. Laser bath contact is a method of irradiating a member with an original beam having a spot diameter of 0.5a+i degrees to locally bath contact both members. When irradiating with the original beam, the irradiation area of the f′i member is locally 1,200 to 1.5
The temperature reached around 00°C.

It is in a molten state. Next, when the irradiation is stopped, localized quenching occurs and the crystallization process progresses rapidly. This crystallization takes place in an extremely short period of time, and the bonding force between atoms is so great that even metal materials can crack due to the condensation force. Misalignment occurs during this crystallization process. When constructing an optical semiconductor module, it is common to melt and fix several bales at the same time.There are variations in the intensity of the divided original beam, and variations in energy density due to differences in the irradiation focus position. Due to differences in gaps between members, etc., an imbalance in condensing force occurs, resulting in a one-position shift.

The amount of displacement ranges from several μm to 30 μm, which poses a particular problem in parts that require strict precision, that is, the arrangement of one light-emitting system and a lens, and the lens and the original fiber.

The second problem is H! This is due to the need to firmly maintain the contact member and the C4 alignment means of multiple axes. The adjustment means must be of a holding or supporting structure that is not affected by the imbalance of condensing forces during the crystallization process that causes the above-mentioned misalignment.To prevent zero misalignment, the VC usually has a power of several liters. In order to avoid the loss of holding power, the thickness of each component of the viewing means is increased.

Or you must use the material of strong pigeons. However, since this material is used to construct a multi-axis adjustment mechanism, the strain adjustment means becomes large and complicated, making it impossible to control minute intervals. Therefore, the optical semiconductor module manufactured by the above-mentioned adjustment means has the disadvantage that it becomes large.

The problems with the conventional example have been described above, but in any case, problems such as the inability to accurately arrange the single-source components and the increase in the size of the optical semiconductor module arise.

[Means to solve the problem]

The optical semiconductor module of the present invention includes an optical fiber.

A terminal member for completely fixing the end fl of this original fiber, a detection element, a first holding member for supporting this light emitting/receiving element, a lens for optically coupling the light emitting/receiving element to the original fiber, and this lens. A source having a second holding member to be fixed and a storage member, and melting and fixing the terminal member, the first holding member and the second holding member described in IOI to the storage member separately described with a light beam of a high-power laser. In the hand module, the front 8c terminal member.

A ferromagnetic material is fixed to the bottom surface of each of the first holding member and the second holding member.

〔Example〕

Next, one embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view of a first embodiment of the invention.

An optical fiber 101 made of quartz or a multi-component material is inserted into a through hole 102 provided at the center of an end member 103 and fixed with an epoxy adhesive 104. The terminal member 103 has an end face 113 sufficiently flat in order to improve alignment with the housing member 105, and a flange to facilitate irradiation with a light beam from an output laser such as a YA(] laser. In addition, the donut-shaped permanent magnet 1 fixed with adhesive is attached to the bottom surface vCf'i of the end surface 113 of the terminal member.
11 are provided. Inside the housing member 105, there is a light emitting/receiving element 10 consisting of a light emitting source such as a semiconductor laser or a light emitting diode, or a photodetector such as a silicon-based or germanium-based photodetector.
6 and the original fiber 10
A second holding member 109 to which a lens 107 is fixed for optimizing optical coupling to the lens 1 is installed. In addition, in the present example.

The lens 107 is of a refractive index distribution type with a large refractive index at the center. ml holding member 108. Second holding member 10
Similar to the terminal member 103, 9 is a plate-shaped plate having a flange having a sufficiently flat holding member end surface 114 at the swinging portion with the storage member 105, and fixed to the bottom surface of the holding member end surface 114 with adhesive. A permanent magnet 112 is provided. Terminal member 103. The thickness of the brim of the first holding member 108 and the second holding member 109 is approximately 200 μm to 500 μm in order to facilitate bath fusion bonding with the storage member 105 using a high-power laser beam.

The storage member 105 is made of a ferromagnetic material containing iron or nickel, that is, 54.488% iron.

Kel 29chi, cobalt 16%, manganese 0.3chi.

Silicon 0.2%, carbon 0.01%, sulfur 0.002%
It is made of Kovar material, or ferritic, martenbutite precipitation hardened thread stainless steel.

Terminal 1fil material 103, first holding member ios, second
4#: The piece member 109 and the storage member 105 are respectively arranged at predetermined optical relative positions by adjusting means.

They are mutually attracted and fixed by permanent magnets 111 or 112 attached to each member. In this state, the terminal member 103 is irradiated with the original beam of the outgoing laser from the horizontal direction in FIG. A fused joint 110 is formed in both members.

As is clear from the above description, according to the embodiment shown in FIG. 1, the terminal member 103. First holding member 108. Permanent magnets 111 and 112 provided on the bottom surface of the second holding member 109 are attracted to the storage member 105 made of ferromagnetic material with a strong attractive force.

Since this suction is strong, it is possible to minimize the positional shift caused by an imbalance in the condensing force at the f471 itb location, which occurs during rapid cooling immediately after the original beam irradiation is stopped.

Furthermore, if the holding member of this embodiment is used, one member can be held using only a ferromagnetic material, so there is no need to use a reinforcing material to overcome the condensation force as in the conventional adjustment means, and it is simple and easy to use.
Since a small adjustment means is possible, the module can be made smaller.

FIG. 2 is a partially enlarged sectional view of the vicinity of the terminal member 103 of the 042 embodiment of the present invention.

In the embodiment shown in FIG. 2, the storage member 201 is made of a non-magnetic material such as austenitic stainless steel 5O8304 and has a small wall thickness. The other components are the same as the embodiment shown in FIG.

In the embodiment shown in FIG. 2, when placing the terminal member 103 in the storage member 201, the jig ferromagnetic material 202, such as iron or permanent magnet, is positioned on the back side of the terminal member 103. It is fixed by suction between the permanent magnet Ill adhered to the bottom surface. In this positioning and holding state, the original beam is irradiated to perform welding. First holding member 108. Similarly, the second holding member 109 is also bath-welded using a ferromagnetic material for a jig.

As is clear from the above description, according to the embodiment shown in FIG. Strong attraction is maintained by using magnetic material,
The same effect as in the embodiment shown in FIG. 1 can be obtained.

〔Effect of the invention〕

As explained above, the present invention has the advantage that by using a ferromagnetic material for setting and holding one position, it is possible to accurately arrange optical components and to obtain a compact optical semiconductor module.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of 5PJ1 according to the present invention. r song diagram,
FIG. 2 is an enlarged cross-sectional view of the vicinity of the terminal member 103 of the second embodiment of the present invention. 101...Optical fiber, 102...Through hole. 103... Terminal member, 104... Epoxy adhesive, 105... Storage member, 106.
... Light emitting/receiving element. 107... Lens, 108... First holding member. 109... Second holding member, 110...
・Fused joint, 111...Mizuku inkstone, 1st work 2・
·····permanent magnet. 113...Terminal member end face, 114...---
Holding member end face, 201...-Nonmagnetic material storage member, 202... Ferromagnetic material for jig. Agent Patent Attorney Susumu Uchihara / θl: 1C1748° / ρ〆: ]
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: Each piece of material //2: Permanent magnet 106
: Selling H body /13: End Jube Saeho decoy lθ7
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Claims (1)

[Claims] An optical fiber, a terminal member that fixes the end of the optical fiber, a light emitting/receiving element, and a first light emitting/receiving element that supports the light emitting/receiving element.
a holding member, a lens for optically coupling the light emitting/receiving element to the optical fiber, a second holding member for fixing this lens, and a storage member, and the terminal member, In the optical semiconductor module in which the first holding member and the second holding member are melted and fixed to the storage member, a strong member is provided on the bottom surface of each of the terminal member, the first holding member, and the second holding member. An optical semiconductor module characterized by having a magnetic material fixed thereto.