Use of wavelength selective switch for a few-mode fiber
First Claim
1. A wavelength selective switch (WSS), comprising:
- a front-end unit comprising;
an input few-mode fiber (FMF) providing an input optical signal comprising multiple wavelengths, the multiple wavelengths each having N modes;
two or more output few-mode fibers (FMFs); and
a side of the front-end unit having a 1×
N port for each of the input FMF and the two or more output FMFs,each of the 1×
N ports being single mode in a wavelength dispersion dimension and N-mode in a switching dimension,the switching dimension being perpendicular to the wavelength dispersion dimension, and the switching dimension and the wavelength dispersion dimension being perpendicular to a direction of propagation of the input optical signala height of each 1×
N port in the switching dimension being less than ((N−
1)×
4ω
)+2ω
, where ω
is equal to a mode radius of a single-mode input with a same numerical aperture; and
a switching element to;
receive the input optical signal from the front-end unit;
switch each of the multiple wavelengths of the input optical signal to form one or more output optical signals; and
direct each of the one or more output optical signals to a corresponding 1×
N port of the front-end unit.
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Accused Products
Abstract
A wavelength selective switch (WSS) may include a front-end unit that includes an input few-mode fiber (FMF) providing an input optical signal including multiple wavelengths. The multiple wavelengths may each have N modes. The front-end unit may include two or more output few-mode fibers (FMFs), and a side that has a 1×N port for each of the input FMF and the two or more output FMFs. Each of the 1×N ports may be single mode in a wavelength dispersion dimension and N-mode in a switching dimension. The WSS may include a switching element to receive the input optical signal from the front-end unit, switch each of the multiple wavelengths of the input optical signal to form one or more output optical signals, and direct each of the one or more output optical signals to a corresponding 1×N port of the front-end unit.
7 Citations
20 Claims
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1. A wavelength selective switch (WSS), comprising:
-
a front-end unit comprising; an input few-mode fiber (FMF) providing an input optical signal comprising multiple wavelengths, the multiple wavelengths each having N modes; two or more output few-mode fibers (FMFs); and a side of the front-end unit having a 1×
N port for each of the input FMF and the two or more output FMFs,each of the 1×
N ports being single mode in a wavelength dispersion dimension and N-mode in a switching dimension,the switching dimension being perpendicular to the wavelength dispersion dimension, and the switching dimension and the wavelength dispersion dimension being perpendicular to a direction of propagation of the input optical signal a height of each 1×
N port in the switching dimension being less than ((N−
1)×
4ω
)+2ω
, where ω
is equal to a mode radius of a single-mode input with a same numerical aperture; anda switching element to; receive the input optical signal from the front-end unit; switch each of the multiple wavelengths of the input optical signal to form one or more output optical signals; and direct each of the one or more output optical signals to a corresponding 1×
N port of the front-end unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
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8. A wavelength selective switch (WSS), comprising:
-
a front-end unit comprising; two or more input few-mode fibers (FMFs) providing two or more input optical signals, each input optical signal comprising multiple wavelengths, where the multiple wavelengths each have N modes; at least one output few-mode fiber (FMF); and a side of the front-end unit having a 1×
N port for each of the two or more input FMFs and the at least one output FMF,each of the 1×
N ports being single mode in a wavelength dispersion dimension and N-mode in a switching dimension,a height of each 1×
N port in the switching dimension being less than ((N−
1)×
4ω
)+2ω
, where ω
is equal to a mode radius of a single-mode input with a same numerical aperture; anda switching element to; receive the two or more input optical signals from the front-end unit; switch each of the multiple wavelengths of the two or more input optical signals to form one or more output optical signals; and direct each of the one or more output optical signals to a corresponding 1×
N port of the front-end unit. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A wavelength selective switch (WSS), comprising:
-
a front-end unit comprising; an input fiber providing an input optical signal comprising multiple wavelengths, where the multiple wavelengths each have N modes; at least two output fibers; and the front-end unit having a 1×
N port for each of the input fiber and the at least two output fibers,each of the 1×
N ports being single mode in a wavelength dispersion dimension and N-mode in a switching dimensiona height of each 1×
N port in the switching dimension being less than ((N−
1)×
4ω
)+2ω
, where ω
is equal to a mode radius of a single-mode input with a same numerical aperture; anda switching element to; receive the input optical signal from the front-end unit; switch each of the multiple wavelengths of the input optical signal to form one or more output optical signals; and direct each of the one or more output optical signals to a corresponding 1×
N port. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification