Sampling of Optical Signals
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorAntonella Bogoni
Life of this patent
Estimating the term…
Abstract
A method and device for sampling ultra-fast optical signals by generating a sampling signal comprising a train of short pulses and coupling the sampling signal together with an optical data signal to be sampled into a highly non-linear optical fibre. Four-wave mixing (FWM) occurs between the two signals resulting in a secondary signal output from the fibre consisting of pulsed components having energy proportional to the instantaneous power of points along the data signal. An analysis of this secondary signal can be carried out to create a normal trace or eye-diagram of the data signal.
Claims29
A method for sampling an optical signal comprising:
- generating an optical sampling signal;
- passing the optical signal and the generated optical sampling signal through a non-linear optical medium such that the optical signal and the optical sampling signal interact to generate a secondary signal having pulsed components proportional to an instantaneous power of the optical signal;
- and
- detecting the secondary signal.
A device for sampling an optical signal comprising:
- an input configured to receiving an optical signal;
- an optical signal generator configured to generate an optical sampling signal;
- a coupler configured to couple the optical signal received at the input and the optical sampling signal to a non-linear optical medium, such that the optical signal and the optical sampling signal interact in the non-linear optical medium to generate a secondary signal having pulsed components proportional to an instantaneous power of the optical signal;
- and
- a detector configured to detect the secondary signal.
An oscilloscope comprising:
- an optical sampling circuit comprising:
- an input configured to receiving an optical signal;
- an optical signal generator configured to generate an optical sampling signal;
- a coupler configured to couple the optical signal received at the input and the optical sampling signal to a non-linear optical medium, such that the optical signal and the optical sampling signal interact in the non-linear optical medium to generate a secondary signal having pulsed components proportional to an instantaneous power of the optical signal;
- and
- a detector configured to detect the secondary signal.
A computer readable medium having instructions stored thereon, the instructions configured to cause a computer processor to:
- receive a signal having pulsed components;
- receive data on a time period, Ts, of an optical signal;
- receive data on the time period, Tc, of a sampling signal;
- and
- determine an order of the pulsed components which represents a period of the optical signal using the formula,
- t
- i
- =
- t
- 0
- +
- Mod
-
- [
- i
-
- (
- T
- S
- -
- T
- C
- )
- T
- S
- ]
- where i is the ith pulsed component of the received signal from time, t0.
Dependencies are inferred from the claim text.