Optical transmission system and transmission method thereof

Abstract

To provide an optical transmission system with suppressed noise generation and a method for transmitting the same. [Solution] The optical transmission system 1 comprises an electro-to-optical conversion device 2, an optical fiber 3, and an optical-to-electrical conversion device 4. The optical fiber 3 has a length of 30 m or less and comprises a core 31, a first cladding 32 provided to cover the core 31, and a second cladding 33 provided to cover the first cladding 32. The refractive index of the first cladding 32 is lower than that of the core 31. The refractive index of the second cladding 33 is lower than that of the first cladding 32. The thickness of the second cladding 33 is 4.0 μm or more.

Claims

1. An electro-optical conversion device having a light-emitting unit that converts an electrical signal into an optical signal and emits the optical signal, An optical fiber for transmitting the optical signal converted by the aforementioned electro-optical conversion device, The system comprises an optical-electrical conversion device that converts the optical signal transmitted from the optical fiber into an electrical signal, The optical fiber is The length is 30m or less. It comprises a core, a first cladding provided to cover the core, and a second cladding provided to cover the first cladding. The refractive index of the first cladding is lower than the refractive index of the core. The refractive index of the second cladding is lower than that of the first cladding. An optical transmission system in which the thickness of the second cladding is 4.0 μm or more.

2. The optical transmission system according to claim 1, wherein the thickness of the second cladding is 5.0 μm or more.

3. The optical transmission system according to claim 1, wherein the optical fiber has a length of 20 m or less.

4. In the optical fiber, The optical transmission system according to claim 1, wherein the refractive index difference between the core and the second cladding is 0.017 or more.

5. In the optical fiber, The optical transmission system according to claim 3, wherein the refractive index difference between the core and the first cladding is 0.005 or more.

6. In the optical fiber, The optical transmission system according to claim 3, wherein the refractive index difference between the first cladding and the second cladding is 0.005 or more.

7. The optical transmission system according to claim 1, wherein the electro-optical conversion device and the optical fiber are connected via a lens.

8. The optical transmission system according to claim 1, wherein the electro-optical conversion device is an optoelectronic mixed-signal substrate.

9. The first and second ends of the optical fiber are each polished at an angle. The electro-optical conversion device and the first end of the optical fiber are connected via an obliquely polished MT ferrule. The optical transmission system according to claim 1, wherein the photoelectric conversion device and the second end of the optical fiber are connected via an obliquely polished MT ferrule.

10. The optical transmission system according to claim 1, wherein the optical fiber is fixed to an electro-optical conversion device by an MT ferrule.

11. The optical transmission system according to claim 1, wherein the optical fiber is a plastic optical fiber.

12. A method of transmitting light, An introduction step of introducing electricity to the electro-to-optical conversion device of the optical transmission system according to any one of claims 1 to 11, The aforementioned electric-to-optical conversion device includes a conversion step of converting the introduced electricity into light, The process includes a light transmission step of passing the aforementioned light through the optical fiber, A method for transmitting light, wherein in the light transmission process, the divergence angle of the light that returns due to reflection is 24 degrees or more.

Images