EN
Application: star-to-satellite, star-to-earth laser communication system
Introduction
Introduction
1. Laser wavelength and polarization state:
A: Emit 1540.56 ± 0.002nm (ITU: C46), left circularly polarized;
A: Receiving 1563.05 ± 0.002nm (ITU: C18), right circularly polarized;
B: Emit 1563.05 ± 0.002nm (ITU: C18), right circularly polarized;
B: Receiving 1540.56 ± 0.002nm (ITU: C46), left circularly polarized;
2. Communication distance: ≥5000km;
3. Communication speed: 1.25Gbps / 2.5Gbps / 5Gbps / 10Gbps (optional);
4. Communication error rate (after decoding): ≤1×10⁷;
5. Rotation range: azimuth angle ≥-90°~+90°; pitch angle ≥-40°~+5°;
6. Maximum tracking angular velocity: ≥0.5°/s;
7. Capture the scene: ≥3mrad;
8. Capture time: ≤15s @ uncertain area 1mrad;
9. Capture probability: ≥95%;
10. Tracking accuracy: ≤5μrad(3σ);
11. Solar avoidance angle: ≤3°;
12. Laser antenna aperture: ≥60mm;
13. Laser beam divergence angle(θ): ≤50μrad(1/e2)
Features:
A: Emit 1540.56 ± 0.002nm (ITU: C46), left circularly polarized;
A: Receiving 1563.05 ± 0.002nm (ITU: C18), right circularly polarized;
B: Emit 1563.05 ± 0.002nm (ITU: C18), right circularly polarized;
B: Receiving 1540.56 ± 0.002nm (ITU: C46), left circularly polarized;
2. Communication distance: ≥5000km;
3. Communication speed: 1.25Gbps / 2.5Gbps / 5Gbps / 10Gbps (optional);
4. Communication error rate (after decoding): ≤1×10⁷;
5. Rotation range: azimuth angle ≥-90°~+90°; pitch angle ≥-40°~+5°;
6. Maximum tracking angular velocity: ≥0.5°/s;
7. Capture the scene: ≥3mrad;
8. Capture time: ≤15s @ uncertain area 1mrad;
9. Capture probability: ≥95%;
10. Tracking accuracy: ≤5μrad(3σ);
11. Solar avoidance angle: ≤3°;
12. Laser antenna aperture: ≥60mm;
13. Laser beam divergence angle(θ): ≤50μrad(1/e2)
Features:
High communication speed;
Strong anti-interference ability;
Low resource consumption;
PM-QPSK coherent communication system (communication rate of 10Gbps at 5000km, error rate better than 1×10⁷ (after encoding).
Bidirectional high-speed communication between satellites;
Rapid capture and stable tracking of laser links;
Solar transit avoidance ability;
Telemetry and remote control;
In-orbit software refactoring;
Pointing deviation star calibration, inter star calibration, star-ground calibration;
Autonomous coaxial calibration of transceiver axis