Optical power distribution estimation apparatus, optical power distribution estimation method, and computer program

Patent metadata

Field	Value
Publication number	US-2026025202-A1
Application number	US-202219111703-A
Country	US
Kind code	A1
Filing date	Sep 15, 2022
Priority date	Sep 15, 2022
Publication date	Jan 22, 2026
Grant date	—

Abstract

An optical power distribution estimation device including: a coherent receiver that receives a signal transmitted from an optical transmission device via an optical transmission line; and an optical power distribution estimation unit that estimates an optical power distribution on a basis of at least a signal obtained by compensating for or applying a characteristic of an optical reception device to a reception signal received by the coherent receiver or a signal transmitted from the optical transmission device restored on a basis of the reception signal.

First claim

1 . An optical power distribution estimation device comprising:
a coherent receiver configured to receive a signal transmitted from an optical transmission device via an optical transmission line; and an optical power distribution estimator configured to estimate an optical power distribution on a basis of at least a signal obtained by compensating for or applying a characteristic of an optical reception device to a reception signal received by the coherent receiver or a signal transmitted from the optical transmission device restored on a basis of the reception signal.

2 . The optical power distribution estimation device according to claim 1 further comprising:
a transmission signal restorer configured to restore a signal transmitted from the optical transmission device on a basis of the reception signal;
an optical transmission device characteristic applicator configured to apply a characteristic of the optical transmission device to the restored signal; and
an optical reception device characteristic applicator configured to apply a characteristic of the optical reception device to the signal to which a characteristic of the optical transmission device has been applied,
wherein the optical power distribution estimator estimates the optical power distribution by using the reception signal and the signal to which a characteristic of the optical transmission device and a characteristic of the optical reception device have been applied.

3 . The optical power distribution estimation device according to claim 2 ,
wherein the optical transmission device characteristic applicator and the optical reception device characteristic applicator apply a characteristic of the optical transmission device and a characteristic of the optical reception device estimated in advance by convolving the restored signal by a convolution operation.

4 . The optical power distribution estimation device according to claim 1 ,
wherein the reception signal is a signal obtained by compensating for a characteristic of the optical transmission device in the optical transmission device, the optical power distribution estimation device further comprises: an optical reception device characteristic compensator configured to compensate for a characteristic of the optical reception device with respect to the reception signal; and a transmission signal restorer configured to restore a signal transmitted from the optical transmission device on a basis of a reception signal obtained by compensating for a characteristic of the optical transmission device and a characteristic of the optical reception device, and the optical power distribution estimator estimates the optical power distribution by using the reception signal obtained by compensating for a characteristic of the optical transmission device and a characteristic of the optical reception device and a restored signal.

5 . The optical power distribution estimation device according to claim 4 ,
wherein the optical reception device characteristic compensator compensates for an inverse characteristic of the optical reception device estimated in advance by convolving the reception signal by a convolution operation.

6 . An optical power distribution estimation method comprising:
receiving a signal transmitted from an optical transmission device via an optical transmission line; and estimating an optical power distribution on a basis of at least a signal obtained by compensating for or applying a characteristic of an optical reception device to a received reception signal or a signal transmitted from the optical transmission device restored on a basis of the reception signal.

7 . A non-transitory storage medium that stores a program for making a computer perform processes, the processes comprising:
receiving a signal transmitted from an optical transmission device via an optical transmission line; and estimating an optical power distribution on a basis of at least a signal obtained by compensating for or applying a characteristic of an optical reception device to a received reception signal or a signal transmitted from the optical transmission device restored on a basis of the reception signal.

Assignees

• Ntt Inc

Inventors

• Sasai Takeo
• Nakamura Masanori
• Yamazaki Etsushi
• Nishizawa Hideki
• Sone Yoshiaki
• Kisaka Yoshiaki

Classifications

• H04B10/61 Primary

  Coherent receivers · CPC title

• G01M11/33

  with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face · CPC title

• H04B10/07955 Primary

  Monitoring or measuring power · CPC title

• H04B10/075

  using an in-service signal (H04B10/071 takes precedence) · CPC title