The design and performance of an optically linearized modulator for AM CATV applications is described. The device is based on a cascade coupling of interferometric waveguide phase modulators operating at 1550 nm wavelength. A substantial number of these modulators have been deployed in CATV systems.
"Optically linearized modulator for CATV applications", Proc. SPIE 2291, Integrated Optics and Microstructures II, (21 October 1994); doi: 10.1117/12.190911; https://doi.org/10.1117/12.190911