無溫控光纖光源設備應用於光通訊及光纖感測器

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

102148801

專利證號

I 493157

專利獲證名稱

無溫控光纖光源設備應用於光通訊及光纖感測器

專利所屬機關 (申請機關)

財團法人國家實驗研究院

獲證日期

2015/07/21

技術說明

光纖陀螺儀的寬頻光源波長與陀螺儀比例因子(Scale Factor)成正比。光源波長受到環境溫度變化的平均波長穩定度也因此為重要參數之一。過去歐盟陀螺儀(EuroFOG)架構，使用單通前向超螢光光源架構中以一寬頻光柵(選擇1550nm範圍)達到光源波長穩定的目的。本專利提出一獨特的被動式光源波長穩定架構，在單通與雙通後向超螢光光纖光源架構中以一溫度補償寬頻光柵(選擇1550nm範圍)與光纖吸收體(1530nm範圍吸收量大於1550nm範圍)之組合，在大溫度範圍(-26 到+65 degree C)達到<0.2nm(<150ppm)平均波長飄移，遠優於已知被動式波長穩定架構至少五倍以上。 The mean wavelength of a broadband light source employed in Fiber-Optic Gyros (FOG) is proportional to the FOG’s scale factor. Mean wavelength stability of a broadband light source over temperature is therefore a key parameter for FOGs. In the past, ESA funded EuroFOG adopted a single pass forward configuration with a broadband fiber Bragg grating (FBG) to stabilize the light source mean wavelength. In this patent disclosure, we proposed to employ a coolerless broadband fiber light source in a single or dual pass backward configuration in which a temperature compensated FBG with 1550nm region as its passband located at the terminating or reflected port, and an EDF(Erbium-doped fiber) fiber as an absorber to absorb more light in 1530nm than that of the 1550nm band in the output port, to achieve mean wavelength stabilization better than 0.2nm(<150ppm) from -26 to +65 degree C temperature range.

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