Wavelength tunable bidirectional optical wireless communication system based on self-injection lock

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

17/217,539

專利證號

US 11,314,002 B2

專利獲證名稱

Wavelength tunable bidirectional optical wireless communication system based on self-injection lock

專利所屬機關 (申請機關)

國立臺灣科技大學

獲證日期

2022/04/26

技術說明

一種雙向光傳輸系統，係包含有一個或一個以上的節點端及光終端機，其中該節點端包含有一光發射器、一第一光接收器及一波束準直器，而該光終端機包含有一空間光調變器、一被動復歸反射器、一第二光接收器，該光終端機能夠於接收該節點端所發射之經調變帶有訊號與未經調變的入射光束後，能夠使經調變帶有訊號的入射光束讓該第二光接收器進行接收，而未經調變的入射光束則會反射朝向該空間光調變器，以調變出一帶有訊號之復歸光束，之後再平行於該入射光束的行進路徑，將該復歸光束打回該節點端，並由該第一光接收器進行接收，因此本案能夠將入射光束進行重新配置輸出波束寬度及位置，使系統得以輕量化，且減少耗能，以達到非對稱式雙向無線光通訊系統節點之目的。 A bidirectional optical wireless transmission system which at least includes one or more optical nodes and terminals is proposed. While the optical node is composed of an optical transmitter, a first optical receiver and a beam collimator; a spatial light modulator, a passive retroreflector and a second optical receiver are employed by the optical terminal to receive the modulated and unmodulated incident beams, which were transmitted from the optical node simultaneously. In the optical terminal, the modulated incident beams are received by the second receiver and the unmodulated incident beams are reflected and through the spatial light modulator in order to be modulated by the spatial light modulator. These modulated reflected beams from spatial light modulator are returned to the optical node through the optical path parallel to the incident beams and received by the first optical receiver within the optical node. The proposed invention based on the beam steering technique provides an efficiency approach to reduce system weight and power consumption in the scenario of bidirectional optical wireless communications.

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