Optical cords and optical cables

Abstract

To provide optical codes and optical cables that can relatively reduce insertion loss (IL) and return loss. [Solution] The patch cord 1 comprises a plastic optical fiber 3 extending in the longitudinal direction and an adhesive 6 bonded to the plastic optical fiber 3. The plastic optical fiber 3 comprises a core 31 extending in the longitudinal direction and a cladding 32 covering the core 31 in a direction perpendicular to the longitudinal direction. The plastic optical fiber 3 has a recess 35 at at least one end in the longitudinal direction. The recess 35 is formed when the end face of the core 31 is recessed relative to the end face of the cladding 32. The adhesive 6 is filled into the recess 35.

Claims

1. A plastic optical fiber extending in the longitudinal direction, The adhesive to be bonded to the aforementioned plastic optical fiber and Equipped with, The aforementioned plastic optical fiber is It comprises a core extending in the longitudinal direction and a cladding covering the core in a direction perpendicular to the longitudinal direction, At least one end in the longitudinal direction, the end face of the core has a recess that is recessed relative to the end face of the cladding. An optical cord in which the adhesive is filled into the recess.

2. The optical code according to claim 1, wherein the adhesive contains at least one selected from the group consisting of acrylic adhesives, epoxy adhesives, and silicone adhesives.

3. The optical code according to claim 1, wherein the adhesive is a silicone-based adhesive.

4. The optical code according to claim 1, wherein the Shore D hardness of the adhesive is 85 or less.

5. The optical code according to claim 1, wherein the Shore D hardness of the adhesive is 65 or less.

6. The optical code according to claim 1, wherein the transmittance of the adhesive to light with a wavelength of 850 nm is 85% or more.

7. The optical code according to claim 1, comprising a plurality of plastic optical fibers.

8. Furthermore, it is equipped with a ferrule, The optical cord according to claim 1, wherein at least one end of the plastic optical fiber in the longitudinal direction is fixed to the ferrule.

9. An optical code according to any one of claims 1 to 8, A device connected to the aforementioned optical code and Equipped with, The device includes a device-side optical fiber, An optical cable in which the plastic optical fiber of the optical code and the device-side optical fiber of the device are optically connected via the adhesive.

10. The optical fiber on the device side is The device comprises a device-side core extending in the longitudinal direction and a device-side cladding covering the device-side core in a direction perpendicular to the longitudinal direction, The optical cable according to claim 9, wherein at least one end in the longitudinal direction has a device-side recess in which the end face of the device-side core is recessed relative to the end face of the device-side cladding.

11. The optical cable according to claim 9, wherein the device-side optical fiber is a glass optical fiber.

12. The optical cable according to claim 10, wherein the adhesive is disposed between the core of the plastic optical fiber and the device-side core of the device-side optical fiber.

13. The optical cable according to claim 12, wherein the adhesive is disposed between the cladding of the plastic optical fiber and the device-side cladding of the device-side optical fiber.

14. The optical cord is a patch cord, The aforementioned device is an optical transceiver, The optical cable according to claim 9, wherein the device-side optical fiber is detachably in contact with the adhesive of the optical cord.

15. The optical cable is an active optical cable, The optical code is the cable portion of the active optical cable, The device is the photoelectric conversion portion of the active optical cable, The optical cable according to claim 9, wherein the device-side optical fiber is bonded to the adhesive of the optical code.

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