A spatial light modulator shapes covert beacon light into contour-limited search areas, enabling secure link acquisition without radio transmissions.
A TDFA at the ground station and another on a HAPS relay boost 1950 nm optical signals to offset atmospheric attenuation and turbulence.
Spatial light modulation shapes contour-limited search footprints, enabling covert optical link acquisition without precise partner location.
Analog voltage biasing replaces radiation-sensitive digital control in spacecraft optical interconnects, preventing functional interrupts under heavy ion exposure.
Bi-directional TALOC links let airborne platforms measure distance and angle, fuse data into accurate 3D maps, and self-organize as a mobile array.
A gimbal-mounted deformable mirror and wavefront sensor correct atmospheric aberrations while steering and tracking beams for stable fiber coupling.
Real-time channel analysis adjusts coding, modulation, and power to limit bit errors in free-space optical links under turbulence.
A hybrid access plane function coordinates satellite and cellular links to cut hard hand-offs and maintain communication during outages.
Thermal annealing and crystal translation let SPDC optics sustain high-power pumping for faster entanglement swapping with less crystal degradation.
LEO satellites and HAP relays combine optical links and RF access to expand coverage, raise data rate, and cut ground infrastructure.
Maintaining SPDC crystals at annealing temperature and shifting their position cuts laser damage while sustaining satellite-ready entanglement swapping.
Laser and local oscillator tuning offsets Doppler shift in inter-satellite optical links, cutting residual frequency error and link latency.
Adjusting collimator focal length to control beam spread keeps free-space loss and transmission gain balanced across distance changes.
A passive beacon satellite redirects a downlink reference beam so terminals can sense uplink turbulence and predistort laser communications.
Dynamic laser scan speed, overlap, and divergence control shortens satellite link acquisition while improving hit probability under vibration.
Shared wavelength-selective optics enable bidirectional inter-spacecraft laser links with higher bandwidth, lower latency, and lower SWaP.
Optical pump power from a base station lets unpowered FSO terminals amplify and relay signals without local electrical infrastructure.
Direct RF-on-optical transmission uses adaptive intensity compensation to recover sensor data reliably while avoiding RF-optical conversion delays.
A speed-based relay distance and closed-loop pointing keep ground-to-satellite laser links aligned through turbulence and lower bit errors.
Selective optical loopback paths calibrate modem and optical head delays, improving satellite time synchronization under varying conditions.
Information is encoded as temperature patterns in black body radiation, enabling communication without power transmission or electromagnetic interference.
Multiple optical units steer transmit and receive paths by target, cutting relay distortion while boosting satellite link capacity and sensitivity.
Soft decoding bits from a second LEO satellite help maintain call continuity and reduce RF link failures during handover.
Electronic phase control in a microlens-array PIC transceiver steers satellite laser beams without moving telescopes, cutting weight and interference.
Physical-layer noise and directional laser and radio links help high-altitude platforms resist eavesdropping without sacrificing low-latency communication.
Fragmented CCSDS transfer frames carry file metadata and improve CubeSat optical downlinks under atmospheric fading and limited onboard processing.
Temperature-modulated black body radiation encodes data without power-based transmission, reducing EMI, privacy risks, and eye safety concerns.
Multiple optical terminals with wide azimuth coverage keep polar-orbit satellite links active during lateral orbit changes and collision avoidance.
An API-driven management layer precomputes contact windows and allocates optical ISL resources for third-party satellites in dynamic orbits.
Artificial noise in laser satellite links blocks lower-SNR eavesdroppers while cutting encryption energy use and latency.
Relative satellite motion shifts coherent optical frequencies; coordinated transmitter and LO laser tuning compensates Doppler effects.
Opposite-direction polarization paths and Faraday rotators compensate parasitic phase effects, reducing modulation errors and preserving signal quality.
Multiple fixed sub-transceivers replace heavy gimbals to widen optical field of view for space-constrained wireless links.
Reconfigurable equalization and phase recovery address Doppler, fading, clock offsets, and polarization changes in optical satellite links.
Laser pulses heat an optical absorber in a cooled cavity to encode data in black body radiation without power-based transmission.
High Doppler, sampling-clock offsets, and polarization impairments are mitigated through reconfigurable equalization and phase recovery.
A speed-positioned relay uses closed-loop pointing to maintain laser alignment and reduce bit errors as satellites move through atmospheric turbulence.
Posture guidance and signal feedback help an electronic device align with a satellite and sustain calls beyond cellular coverage.