JP7153507B2 - Optical subassemblies and optical modules - Google Patents

Description

The present invention relates to optical subassemblies and optical modules.

An optical receiving subassembly (ROSA) is known that converts the optical path of externally incident light with a mirror and causes a light receiving element to receive the light (Patent Document 1). Also known is an optical transmission subassembly (TOSA) that converts the optical path of output light from a light emitting element with a mirror and emits it to the outside. Furthermore, a similar arrangement (BOSA) with transmit and receive functions is also known (US Pat. These are collectively called an optical subassembly (OSA). By using an optical component in which a mirror and a lens are integrated, the size of the device can be reduced (Patent Document 1). Optical elements and optical parts are housed in a housing (Patent Documents 3 to 6).

JP 2014-137410 A JP 2015-197651 A JP 2013-125045 A JP 2013-171161 A JP 2013-140292 A U.S. Patent Application Publication No. 2015/0253520

A certain focal length may be required in order not to deteriorate the transmission characteristics. Therefore, since the required distance is secured between the mirror and the lens, the optical component has a long shape in this direction. Optical components made of resin have a large coefficient of thermal expansion, and therefore undergo a large amount of deformation due to a temperature rise, which causes optical axis misalignment. Optical axis misalignment lowers the optical coupling efficiency, leading to performance degradation.

An object of the present invention is to suppress the occurrence of optical axis misalignment.

(1) An optical subassembly according to the present invention includes a photoelectric element for converting at least one of an optical signal and an electrical signal to the other, a lens for collecting light, and a mirror for changing the optical path at a reflection point. and a housing made of metal or ceramic that houses the photoelectric element and the optical component, and the photoelectric element is arranged so that the light input/output part faces upward. and the optical component has the mirror above the photoelectric element, the lens on the side of the mirror along a first direction on the bottom surface, and the a first region fixed to the bottom surface at a position closer to the mirror than directly under the surface of the lens, the first regions extending in mutually opposite directions in the first direction from a point directly under the reflecting point; It is characterized by having both ends adjacent to each other in a second direction perpendicular to the first direction with respect to a pair of positions separated by a distance.

(2) The optical subassembly described in (1) may be characterized in that the optical component is longer in the first direction than the first region.

(3) The optical subassembly described in (1) or (2), wherein the optical component is positioned on the bottom surface so as to allow more movement in the first direction relative to the bottom surface than the first region. wherein the second area is not adjacent in the second direction to the point directly below the reflection point, and is closer to the lens than the first area in the first direction. It may be characterized by being in a position close to .

(4) The optical subassembly described in (3), wherein the first region is located adjacent to the point directly below the reflection point in the second direction. good.

(5) The optical subassembly of (3) or (4), further comprising an adhesive for securing the first region to the bottom surface, and securing the second region to the bottom surface. It may be characterized by having no means for

(6) The optical subassembly of (3) or (4), wherein a first adhesive for securing the first region to the bottom surface and for securing the second region to the bottom surface and a second adhesive, wherein the second adhesive is more easily deformed in the first direction than the first adhesive.

(7) The optical subassembly according to any one of (3) to (6), wherein the optical component includes a main body having the lens and mirrors and two sides of the optoelectronic device in the second direction. and a pair of first legs each having said first region and a second leg having said second region.

(8) In the optical subassembly described in (7), the optical component has the second leg separated from each of the pair of first legs in the first direction. may be characterized.

(9) In the optical subassembly described in (7), the optical component may have the second leg spaced apart from the photoelectric element in the first direction.

(10) The optical subassembly according to any one of (7) to (9), wherein each of the pair of first legs is separated into a plurality of first legs in the first direction. and each of the plurality of first legs has the first region.

(11) The optical subassembly according to any one of (3) to (6), wherein the optical component has a flat lower surface including the first area and the second area. may be

(12) The optical subassembly according to any one of (3) to (6), wherein the optical component has a recess on its lower surface, and the first region is in the recess. It may be a feature.

(13) The optical subassembly according to any one of (3) to (12), comprising: a first spacer facing the first region; a second spacer facing the second region; , wherein the first spacer and the second spacer are interposed between the housing and the optical component.

(14) The optical subassembly according to any one of (3) to (12), further comprising a base substrate made of the metal or the ceramic fixed to the bottom surface of the housing, The photoelectric element and the optical component may be fixed to the bottom surface by fixing to the base substrate.

(15) In the optical subassembly described in (14), the base substrate has a pair of regions spaced apart in the first direction so as to face the first region and the second region, respectively. and a notch between the pair of regions.

(16) In the optical subassembly described in (14) or (15), the base substrate includes a first pedestal facing the first region, a second pedestal facing the second region, It may be characterized by including

(17) The optical subassembly according to any one of (1) to (16), wherein the optical receiving subassembly outputs the electrical signal converted from the input optical signal; ) to (16), further comprising an optical transmission subassembly for outputting the optical signal converted from the input electrical signal. good.

1 is a perspective view of an optical module according to a first embodiment; FIG. 1 is a schematic diagram showing the configuration of an optical transmission device equipped with an optical module according to a first embodiment; FIG. 2 is a side view of the optical subassembly according to the first embodiment; FIG. 1 is an exploded perspective view of an optical subassembly according to a first embodiment; FIG. 1 is a schematic diagram of an optical subassembly according to a first embodiment; FIG. 1 is a perspective view of a photoelectric device and an optical component; FIG. It is a bottom view of an optical component. It is a figure which shows the expanded optical component which concerns on a reference example. Fig. 3 shows an expanded optical component according to the first embodiment; FIG. 5 is a perspective view showing optical components of an optical subassembly according to a second embodiment; FIG. 11 is a perspective view showing optical components of an optical subassembly according to a third embodiment; FIG. 11 is an exploded perspective view of an optical subassembly according to a fourth embodiment; FIG. 11 is a perspective view showing part of an optical subassembly according to a fourth embodiment; FIG. 11 is an exploded perspective view showing part of an optical subassembly according to a fifth embodiment; FIG. 11 is a perspective view showing optical components of an optical subassembly according to a fifth embodiment; FIG. 12 is an exploded perspective view showing part of an optical subassembly according to a sixth embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Below, embodiments of the present invention will be described specifically and in detail based on the drawings. Members denoted by the same reference numerals in all drawings have the same or equivalent functions, and repeated description thereof will be omitted. Note that the size of the figure does not necessarily match the magnification.

[First embodiment]
FIG. 1 is a perspective view of an optical module according to the first embodiment. The optical module 100 is an optical receiver (optical transceiver) having a bit rate of 100 Gbit/s class and a transmission function and a reception function. Standard based. Optical module 100 includes housing 102 with pull tab 104 and slider 106 .

FIG. 2 is a schematic diagram showing the configuration of an optical transmission device equipped with the optical module 100 according to the first embodiment. A plurality of optical modules 100 are attached to the optical transmission device by electrical connectors 108, respectively. Optical transmission devices are, for example, large-capacity routers and switches. An optical transmission device has, for example, a switching function, and is installed in a base station or the like.

The optical transmission device acquires data for reception (electrical signal for reception) from the optical module 100, uses a driver IC (integrated circuit) 110 or the like to determine what data is to be transmitted to where. It generates credit data (electrical signal for transmission) and transmits the data to the corresponding optical module 100 .

The optical module 100 comprises a plurality of optical subassemblies 10 for converting at least one of optical and electrical signals to the other. The plurality of optical subassemblies 10 includes an optical transmitter optical subassembly (TOSA) having an optical transmission function, an optical receiver optical subassembly (ROSA) having an optical reception function, and a bidirectional subassembly having an optical transmission/reception function. assembly (BOSA: Bi-directional Optical Subassembly). An optical fiber 112 is connected to the optical subassembly 10 for the input and output of optical signals.

An electrical signal is transmitted to the circuit board 114 from the optical receiver subassembly 10A. Electrical signals are transmitted from the circuit board 114 to the optical transmission subassembly 10B. The circuit board 114 is a rigid board without flexibility.

3 is a side view of the optical subassembly according to the first embodiment; FIG. FIG. 4 is an exploded perspective view of the optical subassembly according to the first embodiment. FIG. 5 is a schematic diagram of the optical subassembly 10 according to the first embodiment.

The optical subassembly 10 is made of metal (kovar, stainless steel (SUS), CuW, etc.) or ceramic (alumina, AlN, etc.) with a thermal expansion coefficient of about 1×10 ⁻⁶ /K to 12×10 ⁻⁶ /K, for example. It has a housing 12 made of. Housing 12 includes case 14 . The case 14 has a bottom plate portion 16 . The case 14 has a first wall portion 18 rising from the bottom plate portion 16 . Housing 12 includes lid 20 . The lid 20 has an upper plate portion 22 that covers the case 14 . The lid 20 has a second wall portion 24 that hangs down from the top plate portion 22 . The case 14 and the lid 20 are fixed with an adhesive 26 or solder to prevent dust from entering inside.

An optical interface 28 is attached to the housing 12 . The optical interface 28 has a receptacle 30, a receptacle holder 32 and a lens holder 34 in which a collimating lens 36 (FIG. 5) is held. An electrical interface 38 is attached to the housing 12 opposite the optical interface 28 . The electrical interface 38 is a printed circuit board (eg, flexible board).

An optical multiplexer/demultiplexer 40 is mounted inside the housing 12 (on the case 14). In the optical receiving subassembly, the optical multiplexer/demultiplexer 40 is an optical demultiplexer that demultiplexes the wavelength-multiplexed optical signals into optical signals corresponding to respective channels.

The optical subassembly 10, as shown in FIG. 5, includes an optoelectronic device 42 for converting at least one of optical and electrical signals to the other. The optical subassembly 10 is an optical receiving subassembly that outputs an electrical signal converted from an input optical signal. Alternatively, if optoelectronic device 42 is a light emitting device, optical subassembly 10 is an optical transmission subassembly that outputs an optical signal converted from an input electrical signal. A plurality of optical input/output units 44 are monolithically integrated in the photoelectric element 42 so as to correspond to a plurality of channels. A plurality of photoelectric elements 42 each having one optical input/output unit 44 may be arranged.

The photoelectric element 42 is housed in the housing 12 by being fixed to the bottom surface of the housing 12 (bottom plate 16 of the case 14) so that the light input/output unit 44 faces upward. In the case of ROSA, for example, as shown in FIG. 4, an amplifier 46 such as a preamplifier and a chip capacitor 48 are fixedly mounted on the housing 12 with an adhesive or the like. Note that description of wires for electrical connection is omitted.

FIG. 6 is a perspective view of a photoelectric device and an optical component; FIG. 7 is a bottom view of the optical component. The optical subassembly 10 has an optical component 50 made of a resin (polyetherimide, acrylic, etc.) having a coefficient of thermal expansion of about 3×10 ⁻⁵ /K to 10×10 ⁻⁵ /K, for example. The optical component 50 has a lens 52 for narrowing down (for condensing) the optical signal to a desired beam diameter. The focal length of the lens 52 is, for example, 1.5 mm or longer. The optical component 50 has a mirror 54 for redirecting the light at the point of reflection. The mirror 54 bends the optical path in the first direction D<b>1 by 90°, for example, and converts it into an optical path perpendicular to the bottom surface of the housing 12 . The optical component 50 has a body 56 that integrally includes a lens 52 and a mirror 54 .

The optical component 50 has a pair of first legs 58 . A pair of first legs 58 flank the optoelectronic element 42 in a second direction D 2 orthogonal to the first direction D 1 , which is the direction between the mirror 54 and the lens 52 . Optical component 50 (first leg 58 ) includes first region 60 . The optical component 50 has a second leg 62 . The second leg portion 62 is positioned away from each of the pair of first leg portions 58 in the first direction D1. The optical component 50 (second leg 62 ) has a second region 64 .

The optical component 50 is housed in the housing 12 . The optical component 50 is arranged such that the mirror 54 is positioned above the photoelectric element 42 . The optical component 50 is arranged such that the lens 52 is positioned on the side of the mirror 54 along the first direction D1 on the bottom surface of the housing 12 . Also, the distance from the reflection point on the mirror 54 to the lens forming surface is longer than the distance from the mirror 54 to the bottom surface of the housing 12 (the bottom of the first leg 58).

The first region 60 is fixed to the bottom surface of the housing 12 with an adhesive 66 . The first region 60 is located adjacent to the point P directly below the reflection point in the second direction D2. The first region 60 has both ends in the first direction D1. Both ends of the first region 60 extend in a second direction D2 perpendicular to the first direction D1 with respect to a pair of positions separated from a point P directly below the reflection point in the first direction D1 in opposite directions. next to each other. That is, the point P is located between both ends of the first region 60 when viewed with a shift in the first direction D1. The center of both ends of the first region 60 (the center point in the first direction D1) and the point P directly below the reflection point are shifted by only about 0.2 mm in the first direction D1. The lens 52 side ends of both ends of the first region 60 are located closer to the mirror 54 than the surface on which the lenses 52 are formed.

The second region 64 faces the bottom surface of the housing 12 so that the movement in the first direction D<b>1 with respect to the bottom surface of the housing 12 is allowed more than the first region 60 . For example, the second region 64 is not fixed to the bottom surface. In order to prevent the adhesive 66 provided in the first region 60 from adhering to the second region 64, the distance between the first leg 58 and the second leg 62 adjacent in the first direction D1 is preferably 500 μm or more. . The second region 64 is not adjacent to the point P directly below the reflection point in the second direction D2. The second region 64 is positioned closer to the lens 52 than the first region 60 in the first direction D1.

FIG. 8 is a diagram showing an expanded optical component 50 according to a reference example. The optical component 50 has legs that are the same width as the main body 56, and is fixed to the bottom surface with an adhesive 66 as a whole. The optical component 50 expands in the first direction D1 due to heat. When the optical component 50 expands from the original length L to the length L′, the position of the mirror 54 changes, and the position of the optical axis of the reflected light (light ray center position) and the light input/output portion 44 of the photoelectric element 42 changes. deviate, and deterioration of optical coupling occurs.

FIG. 9 is a diagram showing an expanded optical component 50 according to the first embodiment. In this embodiment, the first area 60 is fixed to the bottom surface of the housing 12 with an adhesive 66, but the second area 64 is movable with respect to the bottom surface. This suppresses optical coupling deterioration. Unlike the reference example, the first leg portion 58 is arranged only on the rear side of the main body 56 . Then, it is fixed with an adhesive 66 in the first region 60 to be fixed. Expansion of the optical component 50 due to heat increases with increasing distance from the center of the fixed portion. In the reference example, the center of the fixing portion and the center of the main body are substantially aligned, and there is a certain distance from there to the mirror 54 . Therefore, the amount of positional variation of the mirror 54 is large due to thermal expansion, and deterioration of optical coupling occurs. On the other hand, in the optical component 50 according to the first embodiment, only the first region 60 near the lower side of the mirror 54 is fixed. The distance between the fixed center and the reflection point of the mirror 54 in the first direction D1 is smaller than in the reference example, and the amount of positional fluctuation of the mirror 54 due to thermal expansion can be reduced, thereby suppressing deterioration of optical coupling. can.

For example, when the temperature changes from room temperature (25° C.) to high temperature (85° C.), the optical component 50 thermally expands along the first direction D1 from the center of the first region 60 fixed to the bottom surface. As optic 50 expands from its original length L to length L ₁ ′, the position of mirror 54 changes. The change in reflection point is calculated as follows.

0.2 mm x 60°C x (5 x 10 ^-5 /K)
= 0.0006mm
= 0.6 µm

Although the reflection point changes by 0.6 μm, if the diameter of the light input/output portion 44 of the photoelectric element 42 is 12 to 15 μm and the diameter of the beam spot size is 8 μm, it is considered that deterioration of optical coupling will not occur. Thus, if the deviation in the first direction D1 between the point P (FIG. 7) immediately below the reflection point and the center point of the first region 60 in the first direction D1 is 500 μm or less, optical coupling can be maintained. drool.

According to the present embodiment, even if the optical component 50 expands in the first direction D1 due to heat, since the center of the fixing region of the optical component 50 is arranged near the reflection point of the mirror 54, the optical axis shift is prevented. occurrence can be suppressed. Further, this effect is achieved by the optical component having a shape in which the focal length of the lens 52 for condensing light is rather long, and the distance from the reflection point of the mirror 54 to the lens formation surface is longer than the distance from the reflection point of the mirror 54 to the fixed part. is particularly effective for If the center position of the first region 60 in the first direction D1 and the position of the reflection point match, and if the light input/output unit 44 is arranged on that line, optical axis deviation due to thermal expansion can be minimized. can. However, even if the above-mentioned arrangement is difficult for other reasons such as securing the adhesive strength of the optical component 50, the end portion on the lens 52 side of the both ends of the first region 60 should be closer to the mirror 54 than the lens 52 formation surface. Then, the amount of optical axis deviation due to thermal expansion can be reduced. Furthermore, in the case of the laterally long optical component 50 shown in FIG. 9, if the first region 60 is small, there is a risk that the optical component 50 will fall toward the lens 52 before being fixed. In this embodiment, the influence of thermal expansion is suppressed by arranging the second leg portion 62 and not sufficiently fixing this region.

[Second embodiment]
FIG. 10 is a perspective view showing optical components of an optical subassembly according to the second embodiment. In this embodiment, each of the pair of first legs 258 is separated into a plurality of first legs 258a in the first direction D1. Each of the plurality of first legs 258 a has a first region 260 . The center point between the ends 258e, 258e of the plurality of separated first legs 258a that are farthest in the first direction D1 is the center point of the first region 260 in the first direction D1. Other contents correspond to the contents described in the first embodiment.

[Third embodiment]
FIG. 11 is a perspective view showing optical components of an optical subassembly according to a third embodiment; In this embodiment, the optical component 350 has a second leg 362 at a position spaced apart from the photoelectric element 342 in the first direction D1. The optical component 350 may support the optical component 350 on the lens 352 side with one second leg 362 as long as the main body 356 does not tilt.

The first region 360 is secured to the bottom surface by a first adhesive 368 while the second region 364 is secured to the bottom surface by a second adhesive 370 . The second adhesive 370 deforms more easily in the first direction D1 than the first adhesive 368 does. For example, the second adhesive 370 has a modulus of elasticity or Young's modulus on the order of one-fifth that of the first adhesive 368 . Using such a second adhesive 370 allows the second region 364 to move more relative to the bottom surface than the first region 360 . The use of second adhesive 370 is also applicable to other embodiments.

In this embodiment as well, even if the optical component 350 thermally expands, the displacement on the mirror side can be suppressed because the displacement on the lens 352 side is large. This makes it possible to obtain the same effects as in the first embodiment. Other contents correspond to the contents described in the first embodiment.

[Fourth embodiment]
FIG. 12 is an exploded perspective view of the optical subassembly according to the fourth embodiment. FIG. 13 is a perspective view showing part of the optical subassembly according to the fourth embodiment. In this embodiment, a base substrate 472 made of metal or ceramic is fixed to the bottom surface of the housing 412 . The base substrate 472 has a first pedestal 474 and a second pedestal 476 spaced apart.

Optic 450 has a pair of legs 478 on either side of body 456 . The lower surfaces of the pair of legs 478 are flat and include first regions 460 and second regions 464 . A first pedestal 474 faces the first region 460 . Both are fixed with adhesive 466 . A pair of legs 478 prevent the adhesive 466 from flowing into the body 456 . A second pedestal 476 faces the second region 464 . Both are not fixed by an adhesive 466 or the like and are movable. Thus, optical component 450 is fixed to the bottom surface by fixing to base substrate 472 . Photoelectric element 442 is also fixed to the bottom surface by fixing to base substrate 472 . Other contents correspond to the contents described in the first embodiment.

[Fifth embodiment]
FIG. 14 is an exploded perspective view showing part of the optical subassembly according to the fifth embodiment. FIG. 15 is a perspective view showing optical components of an optical subassembly according to a fifth embodiment; In this embodiment, a base substrate 572 made of metal or ceramic is used as in the fourth embodiment. Photoelectric element 542 and optical component 550 are fixed to the bottom surface by fixing to base substrate 572 .

The optical component 550 has a recess 580 on its bottom surface. First region 560 is in recess 580 . A first spacer 582 and a second spacer 584 are interposed between the base substrate 572 and the optical component 550 . A first spacer 582 faces the first region 560 . A second spacer 584 faces the second region 564 . A first region 560 is secured to the bottom surface by a first adhesive 568 . A second region 564 is secured to the bottom surface by a second adhesive 570 . The second adhesive 570 deforms more easily in the first direction D1 than the first adhesive 568 does. Other contents correspond to the contents described in the first embodiment.

[Sixth Embodiment]
FIG. 16 is an exploded perspective view showing part of the optical subassembly according to the sixth embodiment. In this embodiment, a base substrate 672 made of metal or ceramic is used as in the fourth embodiment. Photoelectric device 642 and optical component 650 are fixed to the bottom surface of the housing by fixing to base substrate 672 . Optic 650 has a flat lower surface that includes first region 660 and second region 664 .

The base substrate 672 has a pair of regions 686 that face the first region 660 and the second region 664 and are spaced apart in the first direction D1. The base substrate 672 has a cutout 688 between the pair of regions 686 . Notch 688 prevents adhesive 666 provided in first region 660 from flowing to second region 664 .

The present invention is not limited to the above-described embodiments, and various modifications are possible. For example, the configurations described in the embodiments can be replaced with configurations that are substantially the same, configurations that produce the same effects, or configurations that can achieve the same purpose.

Reference Signs List 10 optical subassembly, 10A optical receiver subassembly, 10B optical transmitter subassembly, 12 housing, 14 case, 16 bottom plate, 18 first wall, 20 lid, 22 upper plate, 24 second wall, 26 adhesion agent, 28 optical interface, 30 receptacle, 32 receptacle holder, 34 lens holder, 36 collimator lens, 38 electrical interface, 40 optical multiplexer/demultiplexer, 42 photoelectric element, 44 optical input/output unit, 46 amplifier, 48 chip capacitor, 50 optical component, 52 lens, 54 mirror, 56 body, 58 first leg, 60 first region, 62 second leg, 64 second region, 66 adhesive, 100 optical module, 102 housing, 104 pull tab, 106 Slider 108 Electrical connector 110 Driver IC 112 Optical fiber 114 Circuit board 258 First leg 258a First leg 258e End 260 First region 342 Photoelectric element 350 Optical component 352 Lens 356 Main body 360 First region 362 Second leg 364 Second region 368 First adhesive 370 Second adhesive 412 Housing 442 Photoelectric element 450 Optical component 456 Main body 460 First region 464 second region, 466 adhesive, 472 base substrate, 474 first pedestal, 476 second pedestal, 478 leg, 542 photoelectric element, 550 optical component, 560 first region, 564 second region, 568 first adhesive , 570 second adhesive, 572 base substrate, 580 recess, 582 first spacer, 584 second spacer, 642 photoelectric element, 650 optical component, 660 first region, 664 second region, 666 adhesive, 672 base substrate, 686 area, 688 notch, D1 first direction, D2 second direction, P point.

Claims (15)

a photoelectric element for converting at least one of optical and electrical signals to the other;
an optical component made of resin that integrally has a lens for collecting light and a mirror for changing the optical path at the reflection point;
a housing made of metal or ceramic and housing the photoelectric element and the optical component;
has
The photoelectric element is fixed to the bottom surface of the housing so that the light input/output unit faces upward,
The optical component has the mirror above the photoelectric element, the lens forward from the surface of the mirror along a first direction on the bottom surface, and the second optical component is more distant from the surface of the lens than directly below the surface of the lens . having a first region fixed to the bottom surface at a position near the mirror along one direction ;
The first region has two ends adjacent to each other in a second direction orthogonal to the first direction for a pair of positions separated from a point directly below the reflection point in directions opposite to each other in the first direction. has
the optical component has a second region facing the bottom surface such that movement in the first direction with respect to the bottom surface is permitted more than the first region;
the second region is not adjacent to the point directly below the reflection point in the second direction and is located closer to the lens than the first region in the first direction;
a first adhesive for fixing the first region to the bottom surface;
a second adhesive for fixing the second region to the bottom surface;
further having
The optical subassembly , wherein the second adhesive is more deformable in the first direction than the first adhesive . An optical subassembly according to claim 1 , comprising:
The optical component has a concave portion on its lower surface,
The optical subassembly, wherein the first region is in the recess. a photoelectric element for converting at least one of optical and electrical signals to the other;
an optical component made of resin that integrally has a lens for collecting light and a mirror for changing the optical path at the reflection point;
a housing made of metal or ceramic and housing the photoelectric element and the optical component;
has
The photoelectric element is fixed to the bottom surface of the housing so that the light input/output unit faces upward,
The optical component has the mirror above the photoelectric element, the lens forward from the surface of the mirror along a first direction on the bottom surface, and the second optical component is more distant from the surface of the lens than directly below the surface of the lens . having a first region fixed to the bottom surface at a position near the mirror along one direction ;
The first region has two ends adjacent to each other in a second direction orthogonal to the first direction for a pair of positions separated from a point directly below the reflection point in directions opposite to each other in the first direction. has
the optical component has a second region facing the bottom surface such that movement in the first direction with respect to the bottom surface is permitted more than the first region;
the second region is not adjacent to the point directly below the reflection point in the second direction and is located closer to the lens than the first region in the first direction;
The optical component includes a body having the lens and the mirror, a pair of first legs on opposite sides of the photoelectric element in the second direction, each having the first region, and a second leg having the second region. an optical subassembly comprising: two legs ; An optical subassembly according to claim 3 , comprising:
The optical subassembly, wherein the optical component has the second leg spaced in the first direction from each of the pair of first legs. An optical subassembly according to claim 3 , comprising:
An optical subassembly, wherein the optical component has the second leg spaced apart from the photoelectric element in the first direction. An optical subassembly according to any one of claims 3 to 5 ,
each of the pair of first legs is separated into a plurality of first legs in the first direction;
An optical subassembly, wherein each of said plurality of first legs has said first region. a photoelectric element for converting at least one of optical and electrical signals to the other;
an optical component made of resin that integrally has a lens for collecting light and a mirror for changing the optical path at the reflection point;
a housing made of metal or ceramic and housing the photoelectric element and the optical component;
has
The photoelectric element is fixed to the bottom surface of the housing so that the light input/output unit faces upward,
The optical component has the mirror above the photoelectric element, the lens forward from the surface of the mirror along a first direction on the bottom surface, and the second optical component is more distant from the surface of the lens than directly below the surface of the lens . having a first region fixed to the bottom surface at a position near the mirror along one direction ;
The first region has two ends adjacent to each other in a second direction orthogonal to the first direction for a pair of positions separated from a point directly below the reflection point in directions opposite to each other in the first direction. has
the optical component has a second region facing the bottom surface such that movement in the first direction with respect to the bottom surface is permitted more than the first region;
the second region is not adjacent to the point directly below the reflection point in the second direction and is located closer to the lens than the first region in the first direction;
An optical subassembly, wherein said optical component has a planar lower surface that includes said first region and said second region . An optical subassembly according to any one of claims 1 to 7 ,
further comprising a base substrate made of the metal or the ceramic fixed to the bottom surface of the housing;
An optical subassembly, wherein said optoelectronic device and said optical component are fixed to said bottom surface by fixing to said base substrate. a photoelectric element for converting at least one of optical and electrical signals to the other;
an optical component made of resin that integrally has a lens for collecting light and a mirror for changing the optical path at the reflection point;
a housing made of metal or ceramic and housing the photoelectric element and the optical component;
has
The photoelectric element is fixed to the bottom surface of the housing so that the light input/output unit faces upward,
The optical component has the mirror above the photoelectric element, the lens forward from the surface of the mirror along a first direction on the bottom surface, and the second optical component is more distant from the surface of the lens than directly below the surface of the lens . having a first region fixed to the bottom surface at a position near the mirror along one direction ;
The first region has two ends adjacent to each other in a second direction orthogonal to the first direction for a pair of positions separated from a point directly below the reflection point in directions opposite to each other in the first direction. has
the optical component has a second region facing the bottom surface such that movement in the first direction with respect to the bottom surface is permitted more than the first region;
the second region is not adjacent to the point directly below the reflection point in the second direction and is located closer to the lens than the first region in the first direction;
a first spacer facing the first region;
a second spacer facing the second region;
further having
The optical subassembly, wherein the first spacer and the second spacer are interposed between the housing and the optical component . a photoelectric element for converting at least one of optical and electrical signals to the other;
an optical component made of resin that integrally has a lens for collecting light and a mirror for changing the optical path at the reflection point;
a housing made of metal or ceramic and housing the photoelectric element and the optical component;
has
The photoelectric element is fixed to the bottom surface of the housing so that the light input/output unit faces upward,
The optical component has the mirror above the photoelectric element, the lens forward from the surface of the mirror along a first direction on the bottom surface, and the second optical component is more distant from the surface of the lens than directly below the surface of the lens . having a first region fixed to the bottom surface at a position near the mirror along one direction ;
The first region has two ends adjacent to each other in a second direction orthogonal to the first direction for a pair of positions separated from a point directly below the reflection point in directions opposite to each other in the first direction. has
the optical component has a second region facing the bottom surface such that movement in the first direction with respect to the bottom surface is permitted more than the first region;
the second region is not adjacent to the point directly below the reflection point in the second direction and is located closer to the lens than the first region in the first direction;
further comprising a base substrate made of the metal or the ceramic fixed to the bottom surface of the housing;
the optoelectronic device and the optical component are fixed to the bottom surface by fixing to the base substrate;
The base substrate has a pair of regions that face the first region and the second region and are arranged in the first direction with a gap therebetween, and has a notch between the pair of regions. An optical subassembly characterized by: a photoelectric element for converting at least one of optical and electrical signals to the other;
an optical component made of resin that integrally has a lens for collecting light and a mirror for changing the optical path at the reflection point;
a housing made of metal or ceramic and housing the photoelectric element and the optical component;
has
The photoelectric element is fixed to the bottom surface of the housing so that the light input/output unit faces upward,
The optical component has the mirror above the photoelectric element, the lens forward from the surface of the mirror along a first direction on the bottom surface, and the second optical component is more distant from the surface of the lens than directly below the surface of the lens . having a first region fixed to the bottom surface at a position near the mirror along one direction ;
The first region has two ends adjacent to each other in a second direction orthogonal to the first direction for a pair of positions separated from a point directly below the reflection point in directions opposite to each other in the first direction. has
the optical component has a second region facing the bottom surface such that movement in the first direction with respect to the bottom surface is permitted more than the first region;
the second region is not adjacent to the point directly below the reflection point in the second direction and is located closer to the lens than the first region in the first direction;
further comprising a base substrate made of the metal or the ceramic fixed to the bottom surface of the housing;
the optoelectronic device and the optical component are fixed to the bottom surface by fixing to the base substrate;
The optical subassembly , wherein the base substrate includes a first pedestal facing the first region and a second pedestal facing the second region . An optical subassembly according to any one of claims 3 to 11 ,
further comprising an adhesive for fixing the first region to the bottom surface;
An optical subassembly having no means for securing said second region to said bottom surface. An optical subassembly according to any one of claims 1 to 12 ,
The optical subassembly, wherein the optical component is longer in the first direction than the first region. An optical subassembly according to any one of claims 1 to 13 ,
The optical subassembly, wherein the first region is located adjacent in the second direction to the point directly below the reflecting point. An optical subassembly according to any one of claims 1 to 14 , wherein the optical receiver subassembly outputs the electrical signal converted from the input optical signal;
An optical subassembly according to any one of claims 1 to 14 , wherein an optical transmission subassembly outputs said optical signal converted from said input electrical signal;
An optical module characterized by comprising:

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