Multi-band optical network interface

1. A multi-band interface device for optical networks; comprising:

an optical amplifier including:

first ingress ports configured to receive optical transmissions in multiple transmission bands, a first port of the first ingress ports configured to receive a first optical input transmission in a first band of the multiple transmission bands; and

a first egress port configured to provide first optical output transmissions in the multiple transmission bands;

an amplifier noise source:

including a second ingress port configured to receive a second optical input transmission in the first band;

including a second egress port communicatively connected to the first port of the optical amplifier; and

configured to generate the first optical input transmission by amplifying a combination of a noise and the second optical input transmission, a magnitude of the amplification being dependent on a power of the second optical input transmission;

a second noise source; and

an optical switch including:

a third ingress port communicatively connected to the second noise source and configured to receive a third optical input transmission in the first band; and

a third egress port, the third egress port communicatively connected to the second ingress port.

2. The multi-band interface device of claim 1 , wherein:

the noise comprises amplified spontaneous emission noise of the amplifier noise source.

3. The multi-band interface device of claim 1 , wherein:

the amplifier noise source comprises a constant power amplifier.

4. The multi-band interface device of claim 1 , Wherein:

the amplifier noise source is configured to maintain, as the power of the second optical input transmission increases to an operating level, a power of the first optical input transmission within a specified range.

5. The multi-band interface device of claim 1 , wherein:

the first band comprises the L-Band.

6. The multi-band interface device of claim 1 , wherein:

an L-Band Optical Add/Drop Multiplexer of the device comprises the optical switch.

7. The multi-band interface device of claim 1 , wherein:

the magnitude of the amplification is between 90 dB and 40 dB when the power of the second optical input transmission is zero and between −3 dB and +10 dB when the power of the second optical input transmission is at a nominal level.

8. An optical network interface, comprising:

an amplifier including an amplifier ingress port configured to receive a first L-Band optical input transmission;

an amplifier noise source:

including an amplifier noise source ingress port configured to receive a second L-Band optical input transmission;

including an amplifier noise source egress port communicatively connected to the amplifier ingress port; and

configured to generate the first L-Band optical input transmission by amplifying a combination of a noise and the second L-Band optical input transmission, the first L-Band optical input transmission including a variable noise fraction inversely dependent on a power of the second L-Band optical input transmission;

an optical multiplexer including a multiplexer egress port, the multiplexer egress port configured to provide the second L-Band optical input transmission,

at least one processor; and

at least one non-transitory computer readable medium containing instructions that, when executed by the at least one processor, cause the optical network interface to perform operations comprising:

receiving an instruction to activate the optical multiplexer; and

in response to the instruction, increasing the power of the second L-Band optical input transmission over a time interval.

9. The optical network interface of claim 8 , wherein:

a magnitude of an optical signal to noise ratio of the first L-Band optical input transmission increases from between 10 db and 20 db to between 35 db and 40 db as the power of the second L-Band optical input transmission is increased.

10. The optical network interface of claim 8 , wherein:

the noise comprises amplified spontaneous emission noise of the amplifier noise source.

11. The optical network interface of claim 8 , wherein:

the second L-Band optical input transmission includes channelized amplified spontaneous emission noise.

12. The optical network interface of claim 8 , wherein:

the optical network interface further comprises a C-Band amplifier and a C-Band optical multiplexer.

13. The optical network interface of claim 8 , wherein:

a duration of the time interval is between 500 microseconds and 5 seconds.

14. The optical network interface of claim 8 , wherein:

the power of the second L-Band optical input transmission is increased from zero to a nominal level.

15. A method of optical network management, comprising:

deploying a node on an optical network, the node including a multi-band amplifier connected to:

a first noise source through a first optical switch, the first noise source configured to provide first noise in a first band; and

an amplifier noise source, the amplifier noise source including an input and configured to generate a constant power output in a second band by amplifying a combination of an input signal received at the input and an amplifier noise of the amplifier noise source;

calibrating the multi-band amplifier, while providing to the multi-band amplifier:

the first noise in the first band generated by the first noise source; and

the constant power output in the second band generated by the amplifier noise source;

connecting a second optical switch to the input of the amplifier noise source;

providing, from the second optical switch to the amplifier noise source as the input signal, a channelized noise in the second band; and

increasing an amplitude of the channelized noise to a nominal level over a time interval.

16. The method of claim 15 , wherein:

a duration of the time interval is between 500 milliseconds and 5 seconds.

17. The method of d aim 16 , wherein:

the first band is the C-Band and the second band is the L-Band.

18. The method of claim 15 , wherein:

the amplifier noise comprises amplified spontaneous emission noise.

19. The method of claim 15 , wherein:

the multi-band amplifier comprises an L-Band amplifier and a C-Band amplifier.