也证明了利用超低损耗光纤远距离传感有害，有毒，易爆气体(如CH_4)的可能性。
It demonstrates that optical remote sensing of inflammable, explosive and pollution gas such as CH_4 is possible by using extremely low loss optical fiber.
半导体激光器和检测器、低损耗光纤，以及后来的光放大器的发明使得长距离传输成为现实。
The invention of semiconductor lasers and detectors, low-loss optical fiber and, later, optical amplifiers, made long-distance data transport feasible.
本文报导了一种新型低损耗单模光纤的光学耦合器。叙述了应用光线矩阵法和梯度光学理论的设计方法。
The paper reports a novel low loss single mode fiber optic coupler and describes the design procedures employing light matrix method and gradient optics theory.
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