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作为远红外光纤来讲,氧化锗玻璃光纤是一种有希望的候选者,许多实验室已报导过这种光纤的理论研究和尝试性的制备。然而,还没有见到过采用气相反应法制备这种光纤获得成功的消息。从氧化锗玻璃光纤的理论衰减谱知道,如水含量达到1ppb以下的话,在2.4μm波长附近就有可能获得衰减小于0.1dB/km。采用VAD法和脱水技木制备的二氧化硅光纤已获得水含量低于1ppb。因此,假如用VAD法来制备氧化锗玻璃光纤的话,完全有可能达到0.1dB/km的衰
As a far-infrared fiber, germanium oxide glass fiber is a promising candidate and many laboratories have reported theoretical and experimental preparation of such optical fiber. However, success has not been seen in the preparation of such optical fibers by gas phase reaction. From the theoretical attenuation spectrum of germania glass fiber, it is known that if the water content is less than 1 ppb, it is possible to obtain an attenuation of less than 0.1 dB / km near a wavelength of 2.4 μm. Silica fibers prepared using the VAD process and dehydration technology have achieved water contents below 1 ppb. Therefore, it is entirely possible to achieve a decay of 0.1 dB / km if a germania glass optical fiber is prepared by the VAD method