University of Colorado

Nanjing University

Nanjing University of Aeronautics and Astronautics

Shuwei Huang

Shining Zhu

Zhining Peng

Yurou Li

Biao Qian

Jingxuan Li

Zhilin Jin

Gang Zhao

Xiaohan Wang

Kunpeng Jia

Zhenda Xie

The present disclosure discloses a method and apparatus for generating an optical frequency comb. The specific generation method comprises: receiving a pump laser that matches a thermally stable state of a nonlinear optical resonant cavity and causing the pump laser to oscillate in the nonlinear optical resonant cavity, such that a Brillouin gain corresponding to the pump laser coincides with a target longitudinal mode in the nonlinear optical resonant cavity; continuously generating a Brillouin laser at the target longitudinal mode in the case that a pump power of the pump laser exceeds a threshold for generating the Brillouin laser; and generating an optical frequency comb by using the Brillouin laser through a Kerr nonlinear four-wave mixing process. According to the technical solution of the present disclosure, the nonlinear optical resonant cavity with the Brillouin gain can generate an optical frequency comb in its thermally stable region. This optical frequency comb not only has good stability, but also has low quantum noise and narrow linewidth characteristics.

Method and apparatus for generating optical frequency comb

An anti-rollover apparatus and control method for heavy-duty vehicles with a pneumatic brake system includes an anti-yaw module, an anti-roll module, an electronic control unit (ECU) (), a yaw velocity sensor (), and a vehicle roll angle sensor (). The ECU () controls solenoid valves (, and) to achieve braking of part of wheels to obtain anti-yaw torques and improve the yaw stability of the heavy-duty vehicles. The ECU () controls gas switch valves (and) to spray high-pressure gases recovered in brake chambers (, and) out, anti-roll torques are obtained through the jet reactive force, and the roll stability of the heavy-duty vehicles is improved.

Anti-rollover apparatus and control method for heavy-duty vehicles with pneumatic brake system

Growing community of inventors

Nanjing, China

Shuwei Huang