Opt Express. 2023 Apr 24;31(9):13751-13762. doi: 10.1364/OE.485096.
The inter-satellite laser ranging heterodyne interferometer is vital for future gravity missions to achieve high ranging accuracy. This paper proposes a novel off-axis optical bench design which integrates merits of the off-axis optical bench design of GRACE Follow-On mission and other on-axis designs. This design makes use of lens systems subtly to restrict the tilt-to-length coupling noise and takes advantage of the DWS feedback loop to maintain the transmitting beam and receiving beam anti-parallel. The critical parameters of the optical components are determined and the carrier-to-noise ratio for a single channel of the photoreceiver is calculated to be more than 100 dB-Hz for the high case. The off-axis optical bench design is a potential candidate for China's future gravity missions.
卫星激光测距外差干涉仪对于未来的重力任务实现高精度测距至关重要。本文提出了一种新颖的离轴光学平台设计，它集成了 GRACE Follow-On 任务的离轴光学平台设计和其他轴上设计的优点。该设计巧妙地利用透镜系统来限制倾斜-长度耦合噪声，并利用 DWS 反馈环来保持发射光束和接收光束反向平行。确定了光学元件的关键参数，并计算出在高灵敏度情况下，单个光接收器通道的载噪比大于 100dB-Hz。离轴光学平台设计是中国未来重力任务的潜在候选方案。
