Patents by Inventor Prashant Kumar RATHORE

Prashant Kumar RATHORE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus and method for adjusting the phase-modulator's modulating signal time reference in a quantum-key-distribution system
    Patent number: 12401426
    Abstract: The present disclosure relates to the field Quantum Key distribution (QKD) and discloses an apparatus (100) and method (300) for adjusting the phase modulator's modulating signal time reference in a phase-based QKD system. The QKD system comprises a pulse generator (10) that generates optical pulses and a phase modulator (20) that modulates the phase of each of the pulses. The apparatus (100) comprises abeam splitter/tap (112), a 1-bit delay interferometer (110), two photodetectors (106,108), and a processing device (104). The splitter feeds the phase modulated optical pulses to the interferometer (110). Two photo detectors are connected to the constructive and destructive output legs (110a,110b) of the interferometer (110). The photo detectors' output are then converted to digital signals and fed to the processing device (104).
    Type: Grant
    Filed: February 16, 2022
    Date of Patent: August 26, 2025
    Assignee: CENTRE FOR DEVELOPMENT OF TELEMATICS
    Inventors: Prasanta Halder, Vivek Kumar, Roshan Lal Sharma, Atul Kumar Gupta, Prashant Kumar Rathore
  • Apparatus And Method For Adjusting The Phase-Modulator's Modulating Signal Time Reference In A Quantum-Key-Distribution System
    Publication number: 20240039635
    Abstract: The present disclosure relates to the field Quantum Key distribution (QKD) and discloses an apparatus (100) and method (300) for adjusting the phase modulator's modulating signal time reference in a phase-based QKD system. The QKD system comprises a pulse generator (10) that generates optical pulses and a phase modulator (20) that modulates the phase of each of the pulses. The apparatus (100) comprises abeam splitter/tap (112), a 1-bit delay interferometer (110), two photodetectors (106,108), and a processing device (104). The splitter feeds the phase modulated optical pulses to the interferometer (110). Two photo detectors are connected to the constructive and destructive output legs (110a,110b) of the interferometer (110). The photo detectors' output are then converted to digital signals and fed to the processing device (104).
    Type: Application
    Filed: February 16, 2022
    Publication date: February 1, 2024
    Applicant: CENTRE FOR DEVELOPMENT OF TELEMATICS
    Inventors: Prasanta HALDER, Vivek KUMAR, Roshan Lal SHARMA, Atul Kumar GUPTA, Prashant Kumar RATHORE