Optical delay device
First Claim
1. An optical device comprising a delay region having a photonic band structure, an optical input and an optical output, wherein the optical input is adapted to couple an input optical signal of a particular wavelength into a particular mode in the delay region such that the optical signal is slowed:
- and, wherein the optical output includes a wavelength selective element to select said particular wavelength.
3 Assignments
0 Petitions
Accused Products
Abstract
An optical device is provided comprising a delay region having a photonic band structure, an optical input, an optical output, wherein the optical input is adapted to couple input optical signals into a predetermined mode in the delay region such that the optical signal is slowed and wherein the optical output includes a wavelength selective element.
Input optical signals are coupled into a highly dispersive mode in the delay region in which the group velocity of the optical signal is reduced. The input signal, which has been delayed and dispersed, is recovered at the output of the device using the wavelength selective element
-
Citations
32 Claims
-
1. An optical device comprising a delay region having a photonic band structure, an optical input and an optical output,
wherein the optical input is adapted to couple an input optical signal of a particular wavelength into a particular mode in the delay region such that the optical signal is slowed: - and,
wherein the optical output includes a wavelength selective element to select said particular wavelength. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
- and,
-
29. An optical device comprising a delay region having a photonic band structure, an optical input and an optical output,
wherein the optical input is adapted to couple an input optical signal of a particular wavelength into a particular mode in the delay region such that the optical signal is slowed; - and,
wherein the delay region is adapted to predominantly reflect the input optical signal at the particular wavelength of operation to allow the input signal to be coupled into a highly dispersive mode.
- and,
-
30. An optical device comprising a delay region having a photonic band structure, an optical input and an optical output,
wherein the optical input is adapted to couple input optical signals into a particular mode in the delay region such that the optical signal is slowed; - and,
wherein the optical device is adapted to cause the optical signals from the input to undergo a plurality of passes through the delay region to thereby increase the optical path length of optical signals in the delay region - View Dependent Claims (31)
- and,
-
32. A method of applying a delay to an optical signal comprises the steps of:
-
coupling the optical signal into a particular mode in a photonic band structure; and
,selecting a part of the optical signal output from the photonic band structure, the selection being made on the basis of wavelength
-
Specification