Thales had three patents in advanced materials during Q2 2024. The patent describes a method for servo controlling an optical device with a cavity exhibiting resonance around a center frequency. The method involves varying the optical frequency of laser radiation to scan the resonance, modulating the phase of the laser radiation, injecting it into the cavity, detecting the radiation intensity, demodulating the electrical signal, and filtering to generate error signals for control. GlobalData’s report on Thales gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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Thales had no grants in advanced materials as a theme in Q2 2024.
Recent Patents
Application: Method for servocontrolling an optical device comprising a laser and a cavity, making it possible to compensate for an amplitude modulation introduced by a phase modulator (Patent ID: US20240120699A1)
The patent filed by Thales SA describes a method for the servo control of an optical device involving a cavity, laser, and phase modulator. The method aims to control the cavity to the laser or vice versa and compensate for amplitude modulation. It includes steps such as varying the optical frequency of laser radiation, modulating the phase of the laser radiation, detecting radiation with a photodiode, demodulating the electrical signal, and computing functions representing changes in error signals. The method involves repeating steps while varying the demodulation phase until a decoupling phase is reached, observing an extremum, and modulating the laser radiation phase. Additionally, it minimizes the amplitude of an additional signal and cancels out certain functions by varying parameters and servo-controlling elements.
The optical device described in the patent comprises a cavity exhibiting resonance, a laser generating laser radiation, an element to vary the optical frequency, a phase modulator, a photodiode for detecting radiation, and a demodulation system. The device also includes a processor to compute functions representing changes in error signals, determine decoupling phases, observe extremums, and modulate the laser radiation phase. It further involves minimizing signal amplitudes, canceling out functions, and servo-controlling elements based on the observations. The device can include various elements such as a laser, acousto-optic modulator, or piezoelectric translation stage, and can be configured with a ring cavity comprising optical fiber and coupling means. Additionally, the device may include optical splitters, circulators, and additional phase modulators for more complex optical setups.
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