US 12,224,803 B2
Control module, optical signal generator module, and RF-over-fiber system
Julius Seeger, Munich (DE)
Assigned to Rohde & Schwarz GmbH & Co. KG, Munich (DE)
Filed by Rohde & Schwarz GmbH & Co. KG, Munich (DE)
Filed on Dec. 2, 2022, as Appl. No. 18/074,324.
Prior Publication US 2024/0195508 A1, Jun. 13, 2024
Int. Cl. H04B 10/516 (2013.01); G02F 1/01 (2006.01); H04B 10/2575 (2013.01)
CPC H04B 10/516 (2013.01) [G02F 1/0118 (2013.01); H04B 10/2575 (2013.01); H04B 2210/006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control apparatus for generating a control signal for an electro-optic modulator, the control apparatus comprising:
an RF signal source being configured to generate a radio frequency (RF) signal;
an amplitude adjustment circuit being configured to adjust an amplitude of the RF signal, thereby obtaining an adjusted RF signal, wherein the RF signal is at least one of a periodic signal, a non-modulated signal, or a monochromatic signal;
a DC signal source being configured to generate a direct current (DC) signal;
a superposition circuit being configured to superimpose the adjusted RF signal and the DC signal, thereby obtaining the control signal for the electro-optic modulator; and
a control circuit, wherein the control circuit is configured to receive at least one frequency parameter associated with the electro-optic modulator, wherein the at least one frequency parameter comprises a frequency multiplication factor and/or a target modulation frequency, and wherein the control circuit is configured to control the DC signal source to adapt a voltage of the DC signal based on the at least one frequency parameter received.