公开(公告)号：US09647765B2

公开(公告)日：2017-05-09

申请号：US14981175

申请日：2015-12-28

Applicant: Massachusetts Institute of Technology

Inventor： David O. Caplan ,  Neal W. Spellmeyer ,  Bryan S. Robinson ,  Scott A. Hamilton ,  Don M. Boroson ,  Hemonth G. Rao ,  Marc C. Norvig

IPC: H04B10/00 ,  H04B10/556 ,  H04B10/67 ,  H04L27/20 ,  H04L27/22 ,  H04J14/00 ,  H04L27/26

CPC classification number: E21B49/00 ,  E21B47/0002 ,  G01V1/40 ,  H04B10/5561 ,  H04B10/677 ,  H04L27/2075 ,  H04L27/2096 ,  H04L27/223 ,  H04L27/2601

Abstract: A burst-mode phase shift keying (PSK) communications apparatus according to an embodiment of the present invention enables practical, power-efficient, multi-rate communications between an optical transmitter and receiver. Embodiments may operate on differential PSK (DPSK) signals. An embodiment of the apparatus includes an average power limited optical transmitter that transmits at a selectable data rate with data transmitted in bursts, the data rate being a function of a burst-on duty cycle. DPSK symbols are transmitted in bursts, and the data rate may be varied by changing the ratio of the burst-on time to the burst-off time. This approach offers a number of advantages over conventional DPSK implementations, including near-optimum photon efficiency over a wide range of data rates, simplified multi-rate transceiver implementation, and relaxed transmit laser line-width requirements at low data rates.

公开(公告)号：US20160134377A1

公开(公告)日：2016-05-12

申请号：US14981175

申请日：2015-12-28

Applicant: Massachusetts Institute of Technology

Inventor： David O. Caplan ,  Neal W. Spellmeyer ,  Bryan S. Robinson ,  Scott A. Hamilton ,  Don M. Boroson ,  Hemonth G. Rao ,  Marc C. Norvig

IPC: H04B10/556

CPC classification number: E21B49/00 ,  E21B47/0002 ,  G01V1/40 ,  H04B10/5561 ,  H04B10/677 ,  H04L27/2075 ,  H04L27/2096 ,  H04L27/223 ,  H04L27/2601

Abstract: A burst-mode phase shift keying (PSK) communications apparatus according to an embodiment of the present invention enables practical, power-efficient, multi-rate communications between an optical transmitter and receiver. Embodiments may operate on differential PSK (DPSK) signals. An embodiment of the apparatus includes an average power limited optical transmitter that transmits at a selectable data rate with data transmitted in bursts, the data rate being a function of a burst-on duty cycle. DPSK symbols are transmitted in bursts, and the data rate may be varied by changing the ratio of the burst-on time to the burst-off time. This approach offers a number of advantages over conventional DPSK implementations, including near-optimum photon efficiency over a wide range of data rates, simplified multi-rate transceiver implementation, and relaxed transmit laser line-width requirements at low data rates.

Abstract translation: 根据本发明的实施例的突发模式相移键控（PSK）通信装置能够实现光发射机和接收机之间的实际功率效率的多速率通信。 实施例可以在差分PSK（DPSK）信号上操作。 该装置的实施例包括平均功率受限的光发射机，其以可选择的数据速率与以突发方式传输的数据进行发射，数据速率是突发占空比的函数。 DPSK符号以突发方式发送，并且可以通过改变突发打开时间与突发关闭时间的比率来改变数据速率。 与传统的DPSK实现相比，这种方法提供了许多优点，包括在宽范围的数据速率下的近最佳光子效率，简化的多速率收发器实现，以及在低数据速率下宽松的发射激光线宽要求。