Data transmission system using optical fiber

Abstract

A data transmission system using an optical fiber includes an optical fiber, a first light-emitting device, a second light-emitting device, a first photo-detecting device and a second photo-detecting device. Each of the first light-emitting device and the second light-emitting device is optically coupled to the input facet of the optical fiber, respectively. Each of the first photo-detecting device and the second photo-detecting device is optically coupled to the output facet of the optical fiber, respectively. In particular, the first light-emitting device and the second light-emitting device are packaged into a first optical subassembly, and the first photo-detecting device and the second photo-detecting device are packaged into a second optical subassembly.

1 . A data transmission system using an optical fiber, the data transmission system comprising:
 the optical fiber having an input facet and an output facet;   a first light-emitting device, optically coupled to the input facet of the optical fiber, for emitting a first data light signal into the input facet of the optical fiber;   a second light-emitting device, optically coupled to the input facet of the optical fiber, for emitting a second data light signal into the input facet of the optical fiber;   a first photo-detecting device, optically coupled to the output facet of the optical fiber, for receiving the first data light signal transmitted over the optical fiber; and   a second photo-detecting device, optically coupled to the output facet of the optical fiber, for receiving the second data light signal transmitted over the optical fiber;   
     wherein the first light-emitting device and the second light-emitting device are packaged into a first optical sub-assembly, and the first photo-detecting device and the second photo-detecting device are packaged into a second optical sub-assembly. 
   
   
       2 . The data transmission system of  claim 1 , wherein the first optical sub-assembly is a BOSA (bi-directional optical sub-assembly). 
   
   
       3 . The data transmission system of  claim 1 , wherein the second optical sub-assembly is a BOSA. 
   
   
       4 . The data transmission system of  claim 1 , further comprising a wavelength selective filter, optically coupled to the output facet of the optical fiber, the first photo-detecting device and the second photo-detecting device. 
   
   
       5 . The data transmission system of  claim 1 , further comprising:
 a first light-sensing device, for sensing the light intensity of the first light-emitting device; and   a second light-sensing device, for sensing the light intensity of the second light-emitting device.   
   
   
       6 . The data transmission system of  claim 1 , wherein a wavelength of each of the light emitted by the first light-emitting device and the second light-emitting device is within the range of about 550 nm to 1650 nm. 
   
   
       7 . The data transmission system of  claim 1 , wherein each of the first light-emitting device and the second light-emitting device is a laser diode. 
   
   
       8 . A data transmission system using optical fibers and utilizing HDCP (high-bandwidth digital content protection), comprising:
 a first optical fiber having one input facet and one output facet;   a second optical fiber having one input facet and one output facet;   a third optical fiber having one input facet and one output facet;   a first light-emitting device, optically coupled to the input facet of the first optical fiber, for emitting a first data light signal associated with HDCP data into the input facet of the first optical fiber;   a first photo-detecting device, optically coupled to the output facet of the first optical fiber, for receiving the first data light signal transmitted over the first optical fiber;   a second light-emitting device, optically coupled to the input facet of the first optical fiber, for emitting a second data light signal associated with the HDCP data into the input facet of the first optical fiber;   a second photo-detecting device, optically coupled to the output facet of the first optical fiber, for receiving the second data light signal transmitted over the first optical fiber;   a third light-emitting device, optically coupled to the input facet of the second optical fiber, for emitting a third data light signal associated with the HDCP data into the input facet of the second optical fiber;   a third photo-detecting device, optically coupled to the output facet of the second optical fiber, for receiving the third data light signal transmitted over the second optical fiber;   a fourth light-emitting device, optically coupled to the input facet of the second optical fiber, for emitting a first clock light signal associated with the HDCP data into the input facet of the second optical fiber;   a fourth photo-detecting device, optically coupled to the output facet of the second optical fiber, for receiving the first clock light signal transmitted over the second optical fiber;   a fifth light-emitting device, optically coupled to the input facet of the third optical fiber, for emitting a second clock light signal associated with the HDCP data into the input facet of the third optical fiber;   a fifth photo-detecting device, optically coupled to the output facet of the third optical fiber, for receiving the second clock light signal transmitted over the third optical fiber;   a sixth light-emitting device, optically coupled to the output facet of the third optical fiber, for emitting, based on the second clock light signal, a first protection scheme light signal associated with the HDCP data into the output facet of the third optical fiber;   a sixth photo-detecting device, optically coupled to the input facet of the third optical fiber, for receiving the first protection scheme light signal transmitted over the third optical fiber;   a seventh light-emitting device, optically coupled to the output facet of the third optical fiber, for emitting a third clock light signal into the output facet of the third optical fiber;   a seventh photo-detecting device, optically coupled to the input facet of the third optical fiber, for receiving the third clock light signal transmitted over the third optical fiber;   an eighth light-emitting device, optically coupled to the input facet of the third optical fiber, for emitting, based on the third clock light signal, a second protection scheme light signal associated with the HDCP data into the input facet of the third optical fiber; and   an eighth photo-detecting device, optically coupled to the output facet of the third optical fiber, for receiving the second protection scheme light signal transmitted over the third optical fiber.   
   
   
       9 . The data transmission system of  claim 8 , wherein the first light-emitting device and the second light-emitting device are packaged into a BOSA. 
   
   
       10 . The data transmission system of  claim 8 , wherein the third light-emitting device and the fourth light-emitting device are packaged into a BOSA. 
   
   
       11 . The data transmission system of  claim 8 , wherein the fifth light-emitting device and the sixth photo-detecting device are packaged into a BOSA. 
   
   
       12 . The data transmission system of  claim 8 , wherein the eighth light-emitting device and the seventh photo-detecting device are packaged into a BOSA. 
   
   
       13 . The data transmission system of  claim 8 , wherein the first photo-detecting device and the second photo-detecting device are packaged into a BOSA. 
   
   
       14 . The data transmission system of  claim 8 , wherein the third photo-detecting device and the fourth photo-detecting device are packaged into a BOSA. 
   
   
       15 . The data transmission system of  claim 8 , wherein the sixth light-emitting device and the fifth photo-detecting device are packaged into a BOSA. 
   
   
       16 . The data transmission system of  claim 8 , wherein the seventh light-emitting device and the eighth photo-detecting device are packaged into a BOSA. 
   
   
       17 . The data transmission system of  claim 8 , further comprising:
 a first wavelength selective filter, optically coupled to the output facet of the first optical fiber, the first photo-detecting device and the second photo-detecting device; and   a second wavelength selective filter, optically coupled to the output facet of the second optical fiber, the third photo-detecting device and the fourth photo-detecting device.   
   
   
       18 . The data transmission system of  claim 8 , further comprising:
 a third wavelength selective filter, optically coupled to the input facet of the third optical fiber, the fifth light-emitting device and the sixth photo-detecting device;   a fourth wavelength selective filter, optically coupled to the output facet of the third optical fiber, the sixth light-emitting device and the fifth photo-detecting device;   a fifth wavelength selective filter, optically coupled to the input facet of the third optical fiber, the eighth light-emitting device and the seventh photo-detecting device; and   a sixth wavelength selective filter, optically coupled to the output facet of the third optical fiber, the seventh light-emitting device and the eighth photo-detecting device.   
   
   
       19 . The data transmission system of  claim 8 , further comprising:
 a first light-sensing device, for sensing the light intensity of the first light-emitting device;   a second light-sensing device, for sensing the light intensity of the second light-emitting device;   a third light-sensing device, for sensing the light intensity of the third light-emitting device; and   a fourth light-sensing device, for sensing the light intensity of the fourth light-emitting device.   
   
   
       20 . The data transmission system of  claim 8 , wherein the light emitted by each of the first to the eighth light-emitting devices has a wavelength within the range of 550 nm to 1650 nm. 
   
   
       21 . The data transmission system of  claim 8 , wherein both the first protection scheme light signal and the second protection scheme light signal are within the range of 550 nm to 1650 nm. 
   
   
       22 . The data transmission system of  claim 8 , wherein each of the first to the eighth light-emitting devices is a laser diode.