A burst-mode phase-shift-keying (PSK) communications apparatus enables efficient, multirate communications between an optical transmitter and receiver by varying the ratio of the burst-on time to the burst-off time.

Optical communication via differential phase-shift-keying (DPSK) signals has been a cornerstone of modern high-speed data transmission technology. Yet, efficient power utilization and multirate operation of such communication systems have always been challenges. Systems often face limitations that are due to strictly defined data rates and high laser line-width requirements, creating a need for a more flexible, efficient system. The problem with existing DPSK solutions revolves around the lack of flexibility and efficiency. Conventional DPSK systems have been typically characterized by their fixed, rigid data rates, which limit their application in diverse use scenarios. Likewise, maintaining the precise laser line-width requirements for lower data rates imposes resource and practical constraints, thereby necessitating a novel approach to implement DPSK systems.

Technology Description

The burst-mode phase-shift-keying (PSK) communications apparatus, designed for efficient transmission and reception of signals, is a technological breakthrough in the field of multirate communications. The apparatus operates on differential PSK (DPSK) signals and adopts a unique approach of transmitting data in bursts. The data rate can be conveniently selected as per the function of the burst-on duty cycle, allowing the DPSK symbols to be transmitted in clusters. This progressive method enhances power management by allowing changes in the data rate through a variable ratio of burst-on to burst-off time. The distinguishing factor of this invention is its scope of benefits over the conventional DPSK implementations. It promises near-optimum photon efficiency across a wide array of data rates, facilitating power-efficient transmissions. A noticeable simplification in multirate transceiver implementation is achieved because of the adaptability to variable data rates. This apparatus also eases the bitterly stringent transmit laser line-width requirements at lower data rates, which is uncommon in typical models.


  • Enhanced power management with adjustable data rate
  • Simplified multirate transceiver implementation
  • Flexibility in selecting data rates
  • Near-optimum photon efficiency over a range of data rates
  • Relaxed laser line-width requirements at low data rates

Potential Use Cases

  • High-speed internet service providers can use the apparatus to provide efficient, flexible and dynamic data rates to customers.
  • Telecommunication sector can leverage it to establish reliable, power-efficient and high-speed communication links.
  • Data centers can utilize the technology for efficient inter-server communications.
  • National security and defense communication systems can adopt the invention for secure, efficient terrestrial and space communications.
  • It can benefit scientific research that requires quick and efficient transmission and reception of data across optical networks.