US 11,990,938 B2
System and method for increasing optical power in an RF over fibre link
Ian Flint, Basildon (GB)
Assigned to LEONARDO UK LTD, London (GB)
Appl. No. 17/634,736
Filed by Leonardo UK Ltd, London (GB)
PCT Filed Aug. 13, 2020, PCT No. PCT/EP2020/072822
§ 371(c)(1), (2) Date Feb. 11, 2022,
PCT Pub. No. WO2021/028556, PCT Pub. Date Feb. 18, 2021.
Claims priority of application No. 1911590 (GB), filed on Aug. 13, 2019.
Prior Publication US 2022/0278749 A1, Sep. 1, 2022
Int. Cl. H04B 10/2575 (2013.01); H04B 10/80 (2013.01)
CPC H04B 10/2575 (2013.01) [H04B 10/807 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A system including an optical link for carrying a microwave radio frequency (RF) signal, the optical link system comprising:
a plurality of laser light sources for producing a plurality of different wavelengths of light;
a multiplexer configured to multiplex the plurality of wavelengths of light to provide a multiplexed optical beam;
a modulator configured to modulate the multiplexed optical beam to impose the microwave RF signal onto the multiplexed optical beam; and
a photodiode receiver having an optical input and an electrical output, the photodiode receiver configured and arranged to receive at least a portion of the modulated multiplexed optical beam and to output the microwave RF signal at its electrical output, wherein the system is configured such that:
optical power of at least the portion of the modulated multiplexed optical beam received at the optical input being equal to a combined optical power of the plurality of different wavelengths of light included in the received modulated multiplexed optical beam; and
each different wavelength of light is separated from the other wavelengths of light by a wavelength separation sufficient that beating between the plurality of different wavelengths of light arising within the multiplexed optical beam occurs at frequencies which are greater than can be resolved by the photodiode receiver.