Precision frequency combs
AssigneeImra America, Inc.
InventorsAntoine Jean Gilbert Rolland, Marco Cassinerio, Jie Jiang, Martin E. Fermann
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Abstract
Examples of compact control electronics for precision frequency combs are disclosed. Application of digital control architecture in conjunction with compact and configurable analog electronics provides precision control of phase locked loops with reduced or minimal latency, low residual phase noise, and/or high stability and accuracy, in a small form factor.
Claims23
A control system for feedback control of at least one parameter of a laser system comprising:
- an analog proportional-integral-derivative (PID) based feedback loop (analog PID), said analog PID configured with an analog control loop;
- a digital proportional-integral-derivative (PID) based feedback loop (digital PID), said digital PID configured in a digital control architecture;
- wherein PID parameters in said analog control loop are configured in response to one or more signals generated with said digital control architecture.
A frequency comb source comprising:
- an electro-optic modulator for intra-cavity loss modulation;
- said electro-optic modulator comprising a first electrode and a second electrode,
- each of said first electrode and second electrode referenced to ground,
- where in absolute terms the first electrode receives a first voltage that is lower compared to a second voltage applied to the second electrode;
- and
- a first modulation bandwidth of said first electrode voltage is configured to be higher than a second modulation bandwidth of said second electrode voltage.
A control system for control of at least one parameter of a laser system, the control system comprising:
- a first proportional-integral-derivative (PID) based feedback loop comprising a field programmable analog array (FPAA);
- and
- a second PID based feedback loop comprising a field programmable gate array (FPGA),
- wherein the FPGA is configured to control a PID parameter of the FPAA.
Dependencies are inferred from the claim text.