Acquisition and pointing control for inter-satellite laser communications

Ultra-low-threshold Er:Yb sol-gel microlaser on silicon

“…The lasing threshold is as low as 4.2µW, which is more than seven times lower than the previously reported lowest threshold to date for a Er 3+ :Yb 3+ co-doped laser, which was based on a microsphere resonant cavity [39]. Ultra-low threshold on-chip microlasers are easily integrated with other silicon-based components, paving the way for improved signal processing [5][6][7][8][9][10][11], biochemical detection [1,2] and free-space communication [3,4].…”

“…Ultra-low threshold lasers which operate in the telecommunications band and which can be integrated with other CMOS compatible elements have numerous applications in biochemical detection [1,2], satellite communications [3,4] and optical computing [5][6][7][8][9][10][11]. To achieve submW lasing thresholds, it is necessary to optimize both the gain medium and the pump method.…”

Challenges to Inter-Satellite Communication System: A Review

“…Another study used laser as a beacon and a transmitter in a pointing control system for inter-satellite laser communication and ranging link [9]. The traffic capacity of the link can be maximized by controlling the beamwidth from broad (in the acquisition stage) to narrow (in the tacking stage).…”

Low threshold Er3+/Yb3+co-doped microcavity laser

“…Ultra-low threshold lasers which operate in the telecommunications band and which can be integrated with other CMOS compatible elements have been developed. These devices have numerous applications in satellite communications [1,2], biochemical detection [3,4] and optical computing [5][6][7][8][9][10]. To optimize both the pump method and the gain medium is important to achieve sub-mW lasing thresholds.…”