CN102736196B - Light transceiver with optical socket obliquely arranged relative to longitudinal axis - Google Patents

Abstract

The present invention discloses a light transceiver which can reduce extra space used for an external optical fiber. The light transceiver is provided with an optical socket with a port, the external optical fiber is inserted into the port, and the port is arranged towards the direction oblique relative to the longitudinal axis of the light transceiver. In another embodiment, the light transceiver is provided with the optical socket, and the optical socket can enable the port to rotate.

Description

Optical transceiver with optical socket arranged obliquely with respect to longitudinal axis

technical field

The invention relates to a housing for an optical transceiver, in particular the invention relates to a housing having an optical receptacle arranged obliquely with respect to the longitudinal axis of the optical transceiver.

Background technique

One type of optical transceiver exposes the optical cavity of the optical receptacle from the faceplate of the host system in which the optical transceiver is mounted. The cavity extends along the longitudinal axis of the optical transceiver and receives an external optical connector securing an optical fiber. When the external optical connector is inserted into the cavity and engaged with the optical receptacle, the external optical fiber is secured so as to extend along the longitudinal axis of the optical transceiver, which is perpendicular or normal to the faceplate. This arrangement requires sufficient space directly in front of the panel to accommodate external fibers.

Contents of the invention

One aspect of the present invention relates to optical transceivers, and more particularly, one embodiment of the present invention relates to housings for optical transceivers. An optical transceiver of an embodiment of the present invention includes: an optical receptacle, an optical subassembly, a circuit, and a housing. The optical receptacle can receive an external optical connector. The optical subassembly may perform conversion between electrical and optical signals, and may be connected to the optical receptacle via an internal optical fiber. The electrical circuit can be electrically connected to the optical subassembly. The housing may house the optical receptacle, the optical subassembly, the internal optical fiber and the electrical circuitry. In one embodiment of the invention, the housing may have a longitudinal axis. An embodiment of the invention is characterized in that the optical receptacle has a cavity into which the external optical connector is inserted, the cavity extending obliquely with respect to the longitudinal axis of the housing.

Since the cavity of the optical receptacle extends obliquely with respect to the longitudinal axis, the external connector can also be inserted into the cavity obliquely with respect to the longitudinal axis, and the longitudinal axis can be connected from the The external optical fiber extracted from the external connector forms a large angle smaller than a right angle, so that the wiring space for the external optical fiber at the front of the optical transceiver can be reduced.

The housing may be provided with a first area to a third area, and the first area to the third area may respectively install the optical socket, the optical subassembly and the circuit. The first region of this embodiment may be surrounded by a rear wall and a pair of side walls. The side wall may have a groove in which the inner optical fiber led out from the optical receptacle is disposed. Another feature of this embodiment is that: the groove in the side wall can extend obliquely relative to the longitudinal axis of the optical transceiver; preferably, the groove can be aligned with the The extension line of the inner optical fiber corresponds, so that the stress exerted on the inner optical fiber can be reduced.

The internal optical fiber may be routed in the housing for exiting the optical receptacle, disposed in the groove, extending along the side of the housing in the second area to the third area , coiled in the third region, extended in reverse along the other side in the second region to the second region, wound in the second region to all the The optical subassembly described above. Therefore, the inner optical fiber can be routed throughout the housing and thus the stress exerted on the inner optical fiber can be reduced.

The optical transceiver may also include: a plurality of transmitter optical subassemblies (TOSA), a plurality of receiver optical subassemblies (ROSA), an optical multiplexer, an optical demultiplexer, a plurality of transmitter optical fibers and a plurality of root receiver fiber. Each TOSA can process specific optical signals with different wavelengths, and each ROSA can also process specific optical signals with different wavelengths. The optical multiplexer may multiplex optical signals transmitted from the TOSA, and the optical demultiplexer may demultiplex optical signals supplied from the outside into optical signals supplied to the ROSA. The transmitter optical fiber may optically connect the optical multiplexer and the TOSA, and the receiver optical fiber may optically connect the optical demultiplexer and the ROSA. In one embodiment, each transmitter fiber and each receiver fiber has an internal connector spliced with a corresponding TOSA and ROSA, respectively. Such an arrangement of the internal connectors may allow replacing only one of the TOSA and/or ROSA.

In one embodiment, the inner optical fiber may include a ferrule at its end, and the optical receptacle may be assembled with an attachment. The sleeve is insertable into the cavity. The attachment can secure the sleeve to the optical receptacle.

Another aspect of the invention relates to an optical transceiver modified from the preceding embodiments. This modification may include a modified optical receptacle to replace the aforementioned optical receptacle, and the modified optical receptacle can have its cavity rotate around an axis perpendicular to the longitudinal and transverse directions of the optical receptacle, that is, the cavity can be Rotate about the vertical axis of the optical transceiver.

The optical socket of this modification is installed in the first area of the housing, the first area may be provided with a metal box body, the metal box body may have a rear wall and a side wall, and the rear wall is provided with a hole . The internal optical fiber led out from the modified optical receptacle passes through the hole to be optically connected with the optical subassembly. The optical transceiver of this modification example may further include a gasket that fits into the hole. The inner optical fiber passing through the hole may be disposed in the gasket. The housing may be provided with a groove in the second region. The internal optical fiber passing through the hole of the metal case may be disposed in the groove. The groove may flare toward the first area. This arrangement of the grooves reduces the stress applied to the inner optical fiber.

Description of drawings

The above and other objects, aspects and advantages of the present invention can be more clearly understood according to the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings, wherein:

1 is an exploded view of an optical transceiver according to an embodiment of the present invention;

2 is a perspective view showing the interior of the optical transceiver by removing the front cover and upper housing;

Fig. 3 is the plan view of the lower shell of optical transceiver and internal optical fiber;

4 is a perspective view showing the inside of the lower case;

Figure 5 is a perspective view of the optical receptacle assembly installed in the housing;

Fig. 6 is an exploded view of the socket assembly shown in Fig. 5;

Figure 7A shows the optical receptacle when viewed from the front, and Figure 7B shows the optical receptacle when viewed from the rear;

Figure 8 shows the receptacle assembly shown in Figure 6, but with the shield removed from the optical receptacle;

Figure 9 is a perspective view of a shield to be attached to an optical receptacle;

Fig. 10 shows enlargedly the front part of the optical transceiver shown in Fig. 1 to Fig. 4;

Figure 11 shows the front of the housing and the front cover removed from the housing;

Figure 12 shows the routing of one of the internal optical fibers for the transmitter and a plurality of transmitter optical fibers;

Figure 13 shows the routing for other of the receiver's inner fibers and multiple receiver fibers;

14 is a perspective view of a receptacle assembly having an optical receptacle conforming to the LC-type optical connector standard;

15 is a perspective view of another receptacle assembly having an optical receptacle conforming to the SC-type optical connector standard;

Figure 16 shows enlargedly the front part of the optical transceiver according to another embodiment of the present invention;

17 is a plan view showing the front of the optical transceiver of another embodiment shown in FIG. 15 by removing the front cover and the upper housing;

Figure 18 is a plan view of the front of the optical transceiver with the optical receptacle rotated from the position shown in Figure 17;

19 is a perspective view showing the inside of the lower case of the optical transceiver shown in FIGS. 14 to 17;

20 is a perspective view of a receptacle assembly installed in the optical transceiver shown in FIGS. 14-18;

Fig. 21 shows enlargedly the front part of optical transceiver, wherein, the socket assembly shown in Fig. 19 is installed in the front part of optical transceiver;

Figure 22 is a perspective view of the front of the optical transceiver shown in Figure 20, wherein the lower housing in Figure 21 is partially cut away;

Figure 23 is a sectional view taken along line XXIII-XXIII in Figure 17;

24 is a perspective view of a box disposed on a first region of the front of the housing; and

Figure 25 shows the gasket mating with the hole in the case.

Detailed ways

Next, some embodiments will be described with reference to the drawings. In describing the drawings, components that are the same as each other are denoted by the same reference numerals or numerals as each other, and descriptions are not repeated.

(first embodiment)

1 is an exploded view of an optical transceiver according to an embodiment of the present invention; FIG. 2 is a perspective view with the front cover and upper housing removed to show the interior of the optical transceiver; and FIG. 3 is a perspective view showing the lower housing and the interior A plan view of an optical fiber.

The optical transceiver 10 shown in Fig. 1 to Fig. 3 is inserted in the cage arranged in the main system along the Z axis, and the Z axis is the longitudinal direction of the optical transceiver 10; the optical transceiver 10 includes: a housing 12, a plurality of transmitting A Transmitter Optical Subassembly (TOSA) 16, a plurality of Receiver Optical Subassemblies (ROSA) 18, and a pair of inner optical fibers F1. The case 12 made of, for example, stainless steel or aluminum may include a lower case 20 and an upper case 22 . In the following description, the words "upper", "lower", "front", "rear" etc. are used for convenience of description without limiting the present embodiment.

Fig. 4 shows the interior of the lower case. The lower case 20 includes a bottom BW, a pair of side parts SW, and a front part FW. The sides SW stand at substantially right angles at each end of the bottom BW. The front FW also stands at right angles to the front of the bottom BW. The front FW runs parallel to the panels in the main system. An opening OP1 is formed in the middle of the front part FW, and the first region R1 is exposed from the opening OP1. In addition to the above-mentioned first region R1 , the lower case 20 further includes a second region R2 and a third region R3 sequentially along the longitudinal direction of the optical transceiver 20 .

The first region R1 is separated by a wall W1 including a first wall W11 and a second wall W12 extending perpendicularly to each other and forming a box. The rear wall W11 is located at the rear end of the first region R1, and the second wall W12 functions as a side wall of the first region R1.

The wall W1 is provided with a pair of first grooves G11 extending in a direction oblique to both the longitudinal direction and the lateral direction (X direction in this embodiment) of the optical transceiver 20 . The first groove G11 receives the inner optical fiber F1. The wall W1 is also provided with another pair of grooves G12 also extending in a direction inclined with respect to the longitudinal and transverse directions but crossing the direction of the first groove G11 . That is to say, the extending direction of the first groove G11 and the extending direction of the groove G12 are axisymmetric with respect to the longitudinal direction of the optical transceiver.

The rear wall W11 is also provided with a pair of recesses G21 extending in the longitudinal direction, and each recess G21 can make the sleeve extending from the optical receptacle be arranged to cooperate with the SC type optical connector. Therefore, the pitch or distance between the pair of recesses G21 satisfies the standard of the SC type optical connector.

The rear wall W11 is further provided with another pair of recesses G22, the recesses G22 are located between the two recesses G21 and extend along the longitudinal direction. A sleeve of another optical receptacle can be provided in the second recess G22, and the sleeve of another optical receptacle is matched with an optical connector called an LC-type optical connector. The pitch or distance of the second concave portion G22 follows the standard of the LC type optical connector.

In this embodiment, the recesses G21 and G22 are formed between the grooves G11 and G12. As shown in FIG. 4, the first groove G11 may be formed on one of the side walls W12, or one of the first grooves G11 is formed on the side wall W12 and the other of the first grooves G11 is formed on the side wall W12. It is formed on the top of the rear wall W11 near the side wall W12. The arrangement of the groove G12 may be the same as that of the first groove G11.

The socket main body 14 can be mounted on the first region R1 partitioned by the walls W11 and W12. Details of the socket main body 14 according to the embodiment of the present invention will be described with reference to FIGS. 5 to 9 . Fig. 5 shows the socket assembly A14 comprising the optical socket of the present embodiment; Fig. 6 is an exploded view of the socket assembly; Fig. 7A and Fig. 7B are perspective views of the optical socket A14, wherein Fig. 7A observes the socket main body 14 from the front so that Showing the cavity 14p of the socket body 14, FIG. 7B is a view of the socket body 14 from the rear to show the other end of the cavity 14p; FIG. 8 is a perspective view of the socket assembly A14 without any shield 26; FIG. 9 is the shield 26 perspective views.

The optical transceiver 10 according to this embodiment may be provided with a socket assembly A14 as shown in FIGS. 5 and 6 . The socket assembly A14 includes: a socket main body 14 , a pair of sleeves S1 , an attachment 24 , and a shield 26 .

The socket main body 14 may be made of resin and includes a pair of cavities 14p. When the socket main body 14 is disposed in the first region R1, the cavity 14p extends in a direction substantially parallel to the first groove G11. 5 and 6, receptacle assembly A14 receives the external optical connector in cavity 14p from the front, and receptacle assembly A14 receives sleeve S1 in the other end of cavity 14p from the rear. An external optical connector may be optically connected to sleeve S1 in cavity 14p.

The sleeve S1 has a cylindrical shape as shown in FIG. 6, and the sleeve S1 includes a flange S1a and an end S1b. The diameter of the flange S1a is larger than the diameter of the end S1b, that is, the flange S1a forms a step portion S1c with respect to the end S1b. The tip S1b is inserted into the cavity 14p of the socket main body 14 so that the stepped portion S1c abuts against a wall formed in the cavity 14p; that is, the wall formed in the cavity 14p serves as a stopper.

The attachment 24 pushes the surface S1d of the sleeve S1 when assembled with the socket main body 14, thereby pressing the stepped portion S1c against the inner surface of the above-mentioned cavity 14p. The attachment 24 may be made of a metal plate, and includes a rear plate 24a and four hooking portions 24b extending forward from the rear plate 24a. The rear plate 24a is provided with a pair of cutouts 24d through which the inner optical fiber F1 passes.

The socket body 14 has a plurality of hooks 14a; The attachment 24 is assembled with the socket body 14 by engaging the hook 14a of the socket body 14 with the opening 14c, the attachment 24 pushes the sleeve S1 forward so that the step S1c abuts against the cavity 14p. Then, the sleeve S1 can be firmly held between the socket main body 14 and the attachment 24 .

The socket body 14 may have a polygonal planar shape, such as a substantially pentagon as shown in FIG. 8 . Both opposite sides of the pentagon are provided with a pair of cavities 14 p , and the other side 14 b of the pentagon may function as a rear wall facing the rear wall W11 of the lower case 20 . The size of the rear wall 14b is about half that of the rear wall W11. Specifically, the rear wall 14b covers only the portion of the rear wall W11 formed with one of the recesses G21 and one of the other recesses G22. A shield 26 is attached to the rear wall 14b.

Specifically, the shield 26 includes a support portion 28 and a sheet 30 . The support part 28 can be made of a metal plate, and the sheet 30 is an elastic or flexible part made of, for example, conductive felt and fixed on the metal support part 28, so that there is no surface of the metal support part 28 on which the sheet 30 is fixed. Facing the rear wall 14b of the socket main body 14 .

The metal support portion 28 is provided with a hole 28a, and the rear wall 14b of the socket main body 14 has a convex portion 14e as shown in FIG. 8 . The shield 26 can be assembled with the receptacle body 14 by fitting the protrusion 14e into the hole 28a.

In addition to referring to FIGS. 5 to 9 , reference is also made to FIGS. 10 and 11 , FIG. 10 showing the front of the optical transceiver 10 enlarged, and FIG. 11 showing the front and front cover 32 . As shown in FIGS. 5 , 8 and 10 , the shield 26 has a lateral width greater than that of the rear wall 14 b of the socket body 14 . That is, the shield 26 is disposed between the rear wall 14b of the socket main body 14 and the rear wall W11 of the first region R1 and covers the entire rear wall W11 so as to close the first recess G21 and the second recess G22. The shield 26 is pushed back by a front cover 32 extending through the socket body 14 as shown in FIG. 11 . the

When the front cover 32 is assembled to the front part FW of the housing 12 by means of screws, the front cover 32 pushes the socket body 14 against the rear wall W11 , and the shield 26 is disposed between the socket body 14 and the rear wall W11 . The front cover 32 is provided with an opening 32b in the middle of its front surface 32a to expose the cavity 14p of the socket. The front cover 32 is also provided with a pair of raised portions on each side of the opening 32b on the opposite side of the front surface 32a, which is hidden in FIG. 11 ; while the socket body 14 has surface 14f and 14g. The projections in the back push against the surfaces 14f and 14g corresponding to the projections to press the socket body 14 against the rear wall W11; thus, the sheet 30 of the shield 26 is pressed tightly against the wall W11.

Although the area of the rear wall 14b is narrower than that of the rear wall W11, that is, the shield 26 protrudes from the rear wall 14b, the sheet 30 can be tightly attached to the rear wall W11 due to the rigidity of the support portion 28. . Thus, by arranging the shield 26 closely attached on the rear wall W11 covering the two cavities G21 and G22, the first region R1 can be electrically shielded with respect to the second region R2.

Referring again to FIGS. 1 to 4 , the lower case of the present embodiment is further provided with fourth regions R4 located on respective sides of the first region R1 . One of the fourth regions R4 may be used to install the optical multiplexer 34 ; meanwhile, the other of the fourth regions R4 may be used to install the optical demultiplexer 36 . One of the inner fibers F1 may be optically connected to an optical multiplexer 34 and the other of the inner fibers F1 may be connected to an optical demultiplexer 36 .

The optical transceiver 10 may be installed with four TOSAs 16, and the wavelengths of optical signals generated by the respective TOSAs 16 are different from each other. The optical transceiver 10 of the present embodiment can be provided with four transmitter optical fibers F2, and each transmitter optical fiber F2 is respectively optically connected to a corresponding TOSA 16 and an optical multiplexer 34 so as to multiplex four optical signals. The optical signal multiplexed by the optical multiplexer 34 may be transmitted by one of the inner optical fibers F1 for transmission to an outer optical fiber passing from the cavity 14p of the receptacle body 14 . Each TOSA 16 can receive electrical signals from circuits installed in the third region R3.

The optical transceiver 10 of this embodiment can utilize the optical signal splitter 36 to receive another optical signal provided by another inner optical fiber F1 and another outer optical fiber provided in the cavity 14p of the socket main body 14 . The optical demultiplexer 36 can demultiplex the multiplexed optical signal into four optical signals, and each optical signal is provided to a corresponding ROSA 18. The optical demultiplexer 36 has four receiver optical fibers F3 to transmit received optical signals in the receiver optical fibers F3. The ROSAs 18 each convert optical signals into electrical signals to output the electrical signals to circuits installed in the third region R3.

Therefore, the optical transceiver 10 can transmit/receive multiplexed optical signals with an equivalent speed of 40 GHz or 100 GHz, that is, four TOSAs and four ROSAs can process electrical and optical signals with a speed of 10 GHz or 25 GHz.

TOSA 16 and ROSA 18 are mounted on the second region R2 of the lower housing 20. The second region R2 is also installed with a tray 38 , eight internal connectors 40 and two integral holders 42 and 44 arranged sequentially from front to rear.

A holder 42 can support the TOSA 16 and is fixed on the lower housing 20, and the holder 42 is provided with four slots arranged laterally for supporting the TOSA 16. Another holder 44 may support the ROSA 18 and is also fixed to the lower housing 20, the holder 44 is provided with four slots also arranged laterally for supporting the ROSA 18. Each of the eight inner connectors 40 is aligned with a corresponding longitudinally extending slot. Four inner connectors each having a ferrule Ff2 at the end are provided for the transmitter fiber F2, while the remaining four inner connectors having a ferrule Ff3 at the end are prepared for the receiver fiber F3.

The tray 38 is mounted on the lower case 20 , and the eight internal connectors 40 are assembled with the tray 38 so that the eight internal connectors 40 can move longitudinally relative to the tray 38 . By moving the inner connector 40 towards the retainers 42 and 44, the inner connector 40 can be engaged with the retainers 42 or 44, thereby disposing the ferrules Ff2 and Ff3 in the respective sockets of the TOSA 16 and ROSA 18 to provide Connect the ferrule to TOSA 16 and ROSA 18. However, by pushing the inner connector 40 toward the tray 38, the ferrule Ff2 or Ff3 can be disengaged from the TOSA 16 or ROSA 18, and the ferrule Ff2 or Ff3 can be placed in a position that does not interfere with the replacement of the TOSA 16 or ROSA 18. That is to say, not only the internal connector 40 can be completely detached from the sleeve of TOSA 16 and the sleeve of ROSA 18, but also there is no overlap between the connector 40 and the sleeve.

Next, the wiring of the inner optical fiber F1, the transmitter optical fiber F2, and the receiver optical fiber F3 in the housing 20 will be described with reference to FIGS. 2 to 4, 12 and 13. FIG. One of the inner optical fibers F1 passes from the first region R1 through one of the grooves G11 to the second region R2; extends along the side SW on the transmitter side (Tx side) to the third region R3; uncoiled In the third region R3; then, extending toward the optical multiplexer 34.

The bottom BW of the second region R2 is provided with grooves or slots G1 , G101 , G102 and G103 extending along the longitudinal direction of the optical transceiver 10 . The groove G1 is formed rearward with respect to the other grooves G101 to G103. The grooves G101 to G103 are arranged in the lateral direction, separated from the groove G1 and extending toward the side of the fourth region R4 where the optical multiplexer 34 is installed. The inner optical fiber F1 coiled in the third region R3 as described above passes through the grooves G1 and G102 and extends under the tray 38 to reach the optical multiplexer 34 .

The transmitter fiber F2 drawn from the optical multiplexer 34 is disposed in the groove G1, coiled in the third region R3, extends along the other side SW (Rx side) in the regions R3 and R2, and is guided into the tray 38 to reach the internal connector 40 for the TOSA 16. The tray 38 is provided with slots for guiding the transmitter fiber F2 and the receiver fiber F3 to the inner connector 40 . These slots may have a brim to prevent the optical fibers disposed in the slots from escaping.

Referring to Fig. 13, another inner optical fiber F1 for the receiver is routed along the side SW through another groove G11 in the first region R1; and wiring along the other side SW in the third region R3 and the second region R2 so as to reach the optical demultiplexer 36 . The bottom BW of the second region R2 is further provided with grooves (or slots) G2 , G201 to G203 extending along the longitudinal direction of the optical transceiver 10 , as shown in FIG. 4 . In addition, the groove G2 is formed behind the other grooves G201 to G203. The inner optical fiber F1 coiled in the third region R3 and extending toward the second region R2 is first set in the above-mentioned groove G2 and then in the groove G202 in order to reach the optical signal separation in the other fourth region R4 Device 36. The receiver optical fiber F3 led out from the optical demultiplexer 36 passes through the grooves G201 and G203 and another groove G2 to reach the third region R3. Then the receiver fiber F3 is coiled in the third region R3; it is routed along the side SW on the transmitter side; it is wound in front of the second region R2 on the receiver side; finally the receiver fiber F3 is guided by the tray 38 and reaches the inside Connector 40.

As shown in FIG. 2, the optical transceiver 10 of the present embodiment is installed with an internal connector 40, holders 42 and 44 above the transmitter optical fiber F2 and the receiver optical fiber F3 in the second region R2; The circuit board is mounted over the inner fiber F1, transmitter fiber F2 and receiver fiber F3. This arrangement of the internal connector 40, the holders 42 and 44, and the circuit board can effectively prevent the optical fibers F1 to F3 from being scattered due to disorder.

In addition, the optical transceiver 10 of this embodiment is provided with a third region R3 for routing the internal fibers F1 to F3, wherein the excess length of the internal fibers F1 to F3 can be properly handled. The third region R3 may be installed with another tray for guiding the inner optical fibers F1 to F3. Another tray to be installed in the third region R3 can provide a function or means of preventing the optical fiber from scattering.

Therefore, according to the optical transceiver 10 of this embodiment, the internal optical fiber F1 led out from the socket body 14 can be arranged in the first groove G11, so that the internal optical fiber F1 passes through the first wall W1, wherein the first groove G11 It is formed to be inclined with respect to the longitudinal direction of the optical transceiver 10 . This arrangement of the inner optical fiber F1 enables the axis of the cavity 14p of the optical receptacle to be inclined relative to the longitudinal direction of the optical transceiver 10, thereby suppressing the stress applied to the optical fiber F1. The external optical fiber fixed in the optical plug inserted into the cavity 14p can be drawn out in a direction extending from the axis of the cavity 14p, which can reduce the space in front of the panel of the main system.

The optical transceiver 10 may be mounted with the socket body 14 reversed; that is, the cavity 14p may face toward the transmitter side. In this case, it is possible to arrange the inner optical fiber F1 in another groove G12 without affecting excessive stress on the optical fiber F1.

Likewise, the optical transceiver 10 may be mounted with other types of socket bodies 14, such as shown in FIGS. 14 and 15, which are perspective views illustrating other optical sockets. The socket main body 14A shown in FIG. 14 is an LC type socket. The inner optical fiber F1A is led out from the sleeve S1A of the receptacle main body 14A substantially parallel to the longitudinal direction of the optical transceiver 10 . Specifically, the inner optical fiber F1A may be disposed on the second recess G22 of the rear wall W11; and be guided in the groove G3 in the second region R2 and reach the third region R3. The shield 26A is provided between the rear side of the socket main body 14A and the rear wall W11 to electrically shield the first region R1 from the inside of the housing 20 .

FIG. 15 is a perspective view showing another type of socket main body 14B, which is called an SC type optical socket.

A sleeve S1B at the end of the socket body 14B is disposed in the cavity 14p, and a rear portion of the sleeve S1B protrudes from the rear wall of the socket body 14B and is disposed on a first recess G21 in the rear wall W11. The inner optical fiber F1B extends from the rear end of the sleeve S1B so as to be disposed in the groove G3 in the second region R2 so as to reach the third region R3. The shield 26B is provided between the rear end of the socket main body 14B and the front surface of the rear wall W11.

Therefore, the optical transceiver 10 according to the embodiment of the present invention can be mounted with various types of optical receptacles. Additionally, an optical receptacle may be mounted such that the axis of the cavity for receiving the external optical plug is arranged obliquely relative to the longitudinal direction of the optical transceiver.

(second embodiment)

Next, another embodiment according to the present invention will be described. Fig. 16 enlargedly shows the front end of optical transceiver 10C according to another embodiment of the present invention; Fig. 17 is the plan view of the front end of optical transceiver 10C, and wherein, front cover 32 and upper case 22 are removed, so that show light Inside of the Transceiver; FIG. 18 is a plan view of the front end of the optical transceiver when the socket body 14C is rotated from the position shown in FIG. 17 . Compared with the arrangements of the above embodiments, the embodiments shown in FIGS. 16 to 18 have the following distinguishing features: the optical transceiver 10C has a socket body 14C that can rotate in the first region R1 . Specifically, the optical transceiver 10C can install the socket main body 14C in the following manner: the cavity of the socket main body 14C can not only be parallel to the longitudinal direction as shown in FIG. tilt.

FIG. 19 is a perspective view of the inside of the lower case 20C of the present embodiment. The optical transceiver 10C is provided with a depressed portion D1 in the bottom BW of the first region R1. In addition, the height of the rear wall W11 is smaller than that of the side walls W12; that is, when the upper case 22 is assembled to the lower case 20C, a space SP1 is created above the first wall W11. The space SP1 may connect the first region R1 and the second region R2, or may expose the inside of the casing 12C from the space SP1. The inner optical fiber F1 drawn out from the receptacle main body 14C may pass through the space SP1 to reach the second region R2, and further, the optical fiber F1 passing through the space SP1 may move in the space SP1 because the space SP1 extends in the lateral direction.

The second region R2 may be provided with another groove or slot G5 extending along the longitudinal direction of the optical transceiver, instead of the grooves G3 and G4 in the previous embodiment shown in FIG. 4 . Groove G5 can receive inner optical fiber F1 leading out from receptacle body 14C. In this embodiment, the groove G5 has a larger width at the front portion of the second region R2 than in other parts of the second region R2; that is, the groove G5 flares forward. This arrangement of the groove G5 can absorb the lateral vibration of the inner fiber F1 caused by the rotation of the receptacle body 14C.

FIG. 20 is a perspective view showing the socket main body 14C of the present embodiment. A protrusion P1 is provided on the surface of the socket main body 14C, that is, the upper surface in this embodiment. The protrusion P1 having a cylindrical cross section may be inserted into or fitted into the depression D1 in the first region R1. Then, the socket body 14C can be rotated about the protrusion P1 as the axis, and the cavity 14p of the socket body 14C can be rotated to be inclined and/or parallel with respect to the longitudinal direction of the optical transceiver.

As in the previous embodiments, the receptacle body 14C can receive an external optical connector in the cavity 14p of the receptacle body 14C. Cavity 14p also receives ferrule S1d from another opening to optically connect the outer optical fiber to ferrule S1. Like the aforementioned socket main body 14 , the socket main body 14C is also assembled with the attachment 24 . The attachment 24 may push the sleeve S1d against the socket body 14C so as to fix the position of the end of the sleeve S1d in the cavity 14p.

Fig. 21 enlarges and shows the first region R1 of the optical transceiver according to another embodiment of the present invention; Fig. 22 is the perspective view of the front end of the optical transceiver, wherein, a part of the front end of the optical transceiver is cut away, so that show light Cross-section of the front end of the transceiver; FIG. 23 is a cross-sectional view of the front of the optical transceiver taken along line XXIII-XXIII in FIG. 17 . The optical transceiver 10C may also be provided with an additional shield 50 .

In addition to referring to FIGS. 21 to 23 , FIG. 24 is a perspective view showing the additional shield 50 , and FIG. 25 is a perspective view showing the gasket. The additional shield 50 includes a box 52 and a gasket 54 . The box body 52 may be made of a metal plate and includes a rear wall 52a and a side wall 52b, the box body 52 is disposed in the first region R1 so as to arrange the rear wall 52a parallel to the rear wall W11 and the side wall 52b parallel On the side wall W12, as shown in FIG. 21 to FIG. 23 . Accordingly, the case body 52 may cover the grooves G11 and G12 and the recesses G21 and G22 formed in the wall W1 so as to shield the first region R1. Furthermore, the box body 52 is provided with a cutout 52h aligned with the space SP1 of the rear wall W11.

The gasket 54 may also be made of metal, and has a tubular shape with a hole extending from the front end 54a to the rear end 54b. The front end 54a may fit in the cutout 52h, and the pad 54 extends from the rear end of the first region R1 to the second region R2 through the space SP1. The inner optical fiber F1 may pass through the cavity of the gasket 54 . As shown in FIG. 25, the gasket 54 is slightly curved in order to reduce leakage of electromagnetic radiation from one end to the other.

Therefore, in the optical transceiver 10C according to the embodiment of the present invention, the receptacle main body 14C can be rotated in the first region R1 so as not only in a direction parallel to the longitudinal direction of the optical transceiver 10C, but also in a direction relative to the optical transceiver 10C. The external fiber inserted into the receptacle body 14C is pulled in a longitudinally inclined direction of the receptacle 10C, which reduces the space directly in front of the panel of the main system.

While the foregoing has shown and described what are presently considered to be exemplary embodiments of the invention, it should be appreciated that various other modifications and changes may be made by those skilled in the art without departing from the essential scope of the invention and Equivalents may be substituted. For example, although the optical transceiver 10C has the recessed portion D1 in the lower case 20C and the protruding portion P1 in the socket main body 14C, it is also possible to provide the protruding portion on the lower case 20C so that the socket main body 14C can be formed with the socket body 14C. The protrusions match the recesses.

In addition, many modifications may be made to adapt a particular situation to the teachings of the invention without departing from the central concept thereof described herein. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that it include all embodiments falling within the scope of the claims.

Claims (8)

1. An optical transceiver, comprising: an optical receptacle for receiving an external optical connector; A plurality of transmitter optical subassemblies each processing specific optical signals having different wavelengths from each other and a plurality of receiver optical subassemblies each processing specific optical signals having different wavelengths from each other Specific optical signal; an optical multiplexer that multiplexes optical signals from the transmitter optical subassembly; an optical demultiplexer that demultiplexes the optical signal into optical signals that are provided to respective receiver optical subassemblies; a pair of internal optical fibers, one of which connects the optical receptacle to the optical multiplexer and the other of which connects the optical The socket is connected to the optical signal splitter; a plurality of transmitter optical fibers each connecting the optical multiplexer to one of the transmitter optical subassemblies; a plurality of receiver optical fibers each connecting the optical signal splitter to one of the receiver optical subassemblies; circuitry electrically connected to the transmitter optical subassembly and the receiver optical subassembly; and housing for housing the optical receptacle, the inner optical fiber, the transmitter optical subassembly, the receiver optical subassembly, the optical multiplexer, the optical demultiplexer, the The transmitter optical fiber, the receiver optical fiber and the circuit shield, the housing has a longitudinal axis, In this case, the optical receptacle has a cavity into which the external optical connector is inserted, the axis of the cavity extending obliquely with respect to the longitudinal axis of the housing. 2. The optical transceiver according to claim 1, wherein, Each transmitter optical fiber has an internal connector connected to a corresponding one of the transmitter optical subassemblies, and each receiver optical fiber has an internal connector connected to a corresponding one of the receiver optical subassemblies. Internal connector to which the receiver optics subassembly connects. 3. The optical transceiver according to claim 1, wherein, each inner optical fiber includes a ferrule at its end that is inserted into the cavity of the optical receptacle, and The optical receptacle is assembled with an attachment that secures the ferrule to the optical receptacle. 4. The optical transceiver according to claim 1, wherein, The optical receptacle is made of resin and has a polygonal planar shape. 5. An optical transceiver, comprising: an optical receptacle for receiving an optical connector; A plurality of transmitter optical subassemblies each processing specific optical signals having different wavelengths from each other and a plurality of receiver optical subassemblies each processing specific optical signals having different wavelengths from each other Specific light signal; an optical multiplexer that multiplexes optical signals from the transmitter optical subassembly; an optical demultiplexer that demultiplexes the optical signal into optical signals that are provided to respective receiver optical subassemblies; a pair of internal optical fibers, one of which connects the optical receptacle to the optical multiplexer and the other of which connects the optical The socket is connected to the optical signal splitter; a plurality of transmitter optical fibers each connecting the optical multiplexer to one of the transmitter optical subassemblies; a plurality of receiver optical fibers each connecting the optical signal splitter to one of the receiver optical subassemblies; circuitry electrically connected to the transmitter optical subassembly and the receiver optical subassembly; and a housing for housing the optical receptacle, the transmitter optical subassembly, the receiver optical subassembly, the inner optical fiber, the transmitter optical fiber, the receiver optical fiber, and the circuitry, The housing has a longitudinal axis, Wherein, the optical receptacle is rotatable about an axis perpendicular to the longitudinal axis of the housing. 6. The optical transceiver according to claim 5, wherein, Each transmitter optical fiber has an internal connector connected to a corresponding one of the transmitter optical subassemblies, and each receiver optical fiber has an internal connector connected to a corresponding one of the receiver optical subassemblies. Internal connector to which the receiver optics subassembly connects. 7. The optical transceiver according to claim 5, wherein, each inner optical fiber includes a ferrule at its end that is inserted into the cavity of the optical receptacle, and The optical receptacle is assembled with an attachment that secures the ferrule to the optical receptacle. 8. The optical transceiver according to claim 5, wherein, The optical receptacle is made of resin and has a polygonal planar shape.