Systems and methods for increasing data rate and storage density in multilayer optical discs

An optical system for a reading beam of a data channel from a moving three-dimensional fluorescent information storage medium comprising:

• a reading optical detector;
• and
• an optical path between an objective lens and the reading optical detector, the optical path comprising a coupling lens and a single-mode optical fiber;
• and
• wherein a numerical aperture of the coupling lens, a separation between the coupling lens and the single-mode optical fiber, and a mode diameter of the single-mode optical fiber are configured to create an active area on the reading optical detector sized to restrict the field of view (FOV) of the reading beam on the active area to 0.3 to 2 Airy disk diameters in a first direction to substantially eliminate intersymbol crosstalk from reading the moving fluorescent information storage medium.

An optical system for detecting a light signal from a moving three-dimensional fluorescent information storage medium, comprising:

• at least one lens that receives and substantially collimates a light signal and focuses the substantially collimated light signal into a single-mode optical fiber having a core diameter of 1-20 micrometers;
• and
• wherein a numerical aperture of the at least one lens, a separation between the at least one lens and the single-mode optical fiber, and a mode diameter of the single-mode optical fiber configured to provide an A value greater than or equal to 0.5 and less than or equal to 10, according to the following equation:
• A
• =
• 2
• ⁢
• ⁢
• π
• ⁢
• ⁢
• a
• 0
• ⁢
• r
• 0
• λ
• ⁢
• ⁢
• d
• =
• 2
• ⁢
• ⁢
• π
• ⁢
• ⁢
• r
• 0
• ⁢
• 1.22
• D
• A
• (
• Equation
• ⁢
• ⁢
• 1
• )
• where:
• a0=the pupil of the at least one lens, d=the distance from the at least one lens to the single-mode optical fiber, r0=the fiber core radius and λ the wavelength of the light signal, a0/d defines a numerical aperture (NA) of the at least one lens, and DA in Equation 1 is the Airy disk diameter given by 1.22 λd/a0=1.22λ/NA to substantially eliminate intersymbol crosstalk from reading the moving fluorescent information storage medium.