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1. A device comprising:

a splitter to:

receive a signal at a first wavelength;

split the received signal into a first portion and a second portion; and

transmit the first portion and the second portion;

a receiver to:

receive, by a detector of the receiver, the first portion from the splitter;

convert, by the detector, the first portion from a first format to a second format;

transmit, by the detector and to a recovery unit of the receiver, the converted first portion;

recover, by the recovery unit, a clock signal from the converted first portion;

receive, by a deframer of the receiver, the converted first portion and the clock signal; and

forward, by the deframer, the converted first portion to a processor; and

a transmitter to:

receive, by a framer of the transmitter, the converted first portion from the processor;

transmit, by the framer and to a modulator of the transmitter, the converted first portion;

receive, by the modulator, the second portion from the splitter;

modulate, by the modulator, the second portion, based on receiving the converted first portion, to create a modulated signal; and

transmit, by the modulator, the modulated signal at the first wavelength.

2. The device of claim 1 , where the first format is an optical format and the second format is an electrical format.

3. The device of claim 1 , where the modulator is a semiconductor optical amplifier.

4. The device of claim 1 , where the framer is further to:

control the modulator to cause the modulator to modulate the converted first portion.

5. The device of claim 1 , where the framer is further to:

operate based on a clock signal,

the clock signal including information regarding another clock signal.

6. The device of claim 5 , where the other clock signal is based on the converted first portion.

7. The device of claim 1 , where the receiver is to convert the first portion to an electrical signal.

8. A method comprising:

receiving, by a splitter, a signal at a first wavelength;

splitting, by the splitter, the received signal into a first portion and a second portion;

transmitting, by the splitter, the first portion and the second portion;

receiving, by a detector of a receiver, the first portion from the splitter;

converting, by the detector, the first portion from a first format to a second format;

transmitting, by the detector and to a recovery unit, the converted first portion;

recovering, by the recovery unit, a clock signal from the converted first portion;

receiving, by a deframer, the converted first portion and the clock signal;

forwarding, by the deframer, the converted first portion to a processor;

receiving, by a framer of a transmitter, the converted first portion from the processor;

transmitting, by the framer and to a modulator, the converted first portion;

receiving, by the modulator, the second portion from the splitter;

modulating, by the modulator, the second portion, based on receiving the converted first portion, to create a modulated signal; and

transmitting, by the modulator, the modulated signal at the first wavelength.

9. The method of claim 8 , further comprising:

using a predetermined ratio to determine how to split the received signal into the first portion and the second portion.

10. The method of claim 8 ,

where the modulator is a semiconductor optical amplifier.

11. The method of claim 8 , further comprising:

controlling, by the framer, the modulator to cause the modulator to modulate the converted first portion.

12. The method of claim 8 , further comprising:

using, by the framer, a clock signal, including information regarding another clock signal, to control the modulator.

13. The method of claim 12 , where the other clock signal is based on the converted first portion.

14. The method of claim 8 , where the first format is an optical format and the second format is an electrical format.

15. A non-transitory computer-readable storage medium comprising:

one or more instructions which, when executed by a device, cause the device to:

receive, by a splitter of the device, a signal at a first wavelength;

split, by the splitter, the received signal into a first portion and a second portion;

receive, by a detector of the device, the first portion from the splitter;

convert, by the detector, the first portion from a first format to a second format;

transmit, by the detector and to a recovery unit of the device, the converted first portion;

recover, by the recovery unit, a clock signal from the converted first portion;

receive, by a deframer of the device, the converted first portion and the clock signal;

transmit, by a framer of the device and to a modulator of the device, the converted first portion;

receive, by the modulator, the second portion from the splitter;

modulate, by the modulator, the second portion, based on the converted first portion, to create a modulated signal; and

transmit, by the modulator, the modulated signal at the first wavelength.

16. The computer-readable storage medium of claim 15 , where the one or more instructions to cause the device to split the received signal include:

one or more instructions to use a predetermined ratio to determine how to split the received signal into the first portion and the second portion.

17. The computer-readable storage medium of claim 15 , where the one or more instructions to cause the device to modulate the second portion include:

one or more instructions to modulate the second portion using on-off keying.

18. The computer-readable storage medium of claim 15 , where the first format is an optical format and the second format is an electrical format.

19. The computer-readable storage medium of claim 15 , where the one or more instructions to cause the device to modulate the second portion include:

one or more instructions to modulate the second portion based on a clock signal, the clock signal including information regarding another clock signal.

20. The computer-readable storage medium of claim 19 , where the other clock signal is based on the converted first portion.