Optical device for simultaneously generating and processing optical codes

A communication network, comprising:

• one or more code generating devices (1), and
• one or more code processing and recognising devices (4, 5),
• wherein at least one of said one or more code generating devices (1) and/or at least one of said one or more code processing and recognising devices (4, 5) comprises at least one optical device (6) adapted to generate and process optical codes at at least one wavelength, comprising P inputs s, with 1≦s≦P, and P≧1, and N outputs k, with 1≦k≦N and N≧1, wherein the network is adapted to simultaneously generate and process Nc phase and/or amplitude optical codes at one or more wavelengths, with Nc≧2, made of C chips with time interval τ, with C≧2, and a transfer function Tsk(ƒ) from the input s to the output k satisfies the following formula:
• 
• T
• sk
• ⁡
• (
• f
• )
• 
• =
• ∏
• v
• =
• 0
• V
• -
• 1
• ⁢
• 
• F
• v
• ⁡
• (
• a
• v
• ⁢
• f
• +
• S
• sk
• N
• k
• ⁢
• τ
• )
• 
• ,
• ⁢
• for
• ⁢
• ⁢
• s
• =
• 1
• ,
• 2
• ⁢
• ⁢
• …
• ⁢
• ⁢
• P
• ⁢
• ⁢
• k
• =
• 1
• ,
• 2
• ,
• …
• ⁢
• ⁢
• N
• where:
• Fv(f) is a transfer function of an optical filter, for v=0, 1, . . . , V−1,
• av is a constant value, for v=0, 1 , . . . , V−1,
• Ssk is an integer number (SskεZ),
• Nk is a constant value, for k=1, 2, . . . N, and
• V is a positive integer number with 1≦V≦log2N.

A code generating device (1), comprising:

• an optical device (6) adapted to generate and process optical codes at at least one wavelength, comprising P inputs s, with 1≦s≦P, and P≧1, and N outputs k, with 1≦k≦N and N≧1, wherein the device is adapted to simultaneously generate and process Nc phase and/or amplitude optical codes at one or more wavelengths, with Nc≧2, made of C chips with time interval τ, with C≧2, characterised in that the transfer function Tsk(ƒ) from the input s to the output k satisfies the following formula:
• 
• T
• sk
• ⁡
• (
• f
• )
• 
• =
• ∏
• v
• =
• 0
• V
• -
• 1
• ⁢
• 
• F
• v
• ⁡
• (
• a
• v
• ⁢
• f
• +
• S
• sk
• N
• k
• ⁢
• τ
• )
• 
• ,
• ⁢
• for
• ⁢
• ⁢
• s
• =
• 1
• ,
• 2
• ⁢
• ⁢
• …
• ⁢
• ⁢
• P
• ⁢
• ⁢
• k
• =
• 1
• ,
• 2
• ,
• …
• ⁢
• ⁢
• N
• where:
• Fv(f) is a transfer function of an optical filter, for v=0, 1, . . . , V−1,
• av is a constant value, for v=0, 1, . . . , V−1,
• S
• sk is an integer number (SskεZ),
• Nk is a constant value, for k=1, 2, . . . N, and
• V is a positive integer number with 1≦V≦log2N,
• the code generating device being apt to be used in a communication network comprising one or more code generating devices (1), and one or more code processing and recognising devices (4, 5).

A code processing and recognising device (4, 5), comprising:

• an optical device (6) configured for controlling at least one optical switcher (13) on the basis of at least one recognised optical code (2), optical device (6) being adapted to generate and process optical codes at at least one wavelength, comprising P inputs s, with 1≦s≦P, and P≧1, and N outputs k, with 1≦k≦N and N≧1, wherein the device is adapted to simultaneously generate and process Nc phase and/or amplitude optical codes at one or more wavelengths, with Nc≧2, made of C chips with time interval τ, with C≧2, and a transfer function Tsk(ƒ) from the input s to the output k satisfies the following formula:
• 
• T
• sk
• ⁡
• (
• f
• )
• 
• =
• ∏
• v
• =
• 0
• V
• -
• 1
• ⁢
• 
• F
• v
• ⁡
• (
• a
• v
• ⁢
• f
• +
• S
• sk
• N
• k
• ⁢
• τ
• )
• 
• ,
• for
• ⁢
• ⁢
• s
• =
• 1
• ,
• 2
• ⁢
• ⁢
• …
• ⁢
• ⁢
• P
• ⁢
• k
• =
• 1
• ,
• 2
• ,
• …
• ⁢
• ⁢
• N
• where:
• Fv(f) is a transfer function of an optical filter, for v=0, 1, . . . , V−1,
• av is a constant value, for v=0, 1, . . . , V−1,
• Ssk is an integer number (SskεZ),
• Nk is a constant value, for k=1, 2, . . . , N, and
• V is a positive integer number with 1≦V≦log2N,
• the code processing and recognising device (4, 5) being adapted to be used in a communication network comprising one or more code generating devices (1), and one or more code processing and recognising devices (4, 5).