FREQUENCY CHAIN TO 3.39-MU-M CH4-STABILIZED HE-NE-LASER USING JOSEPHSON POINT-CONTACT AS HARMONIC MIXER

被引：7
作者：
MIKI, Y
ONAE, A
KUROSAWA, T
AKIMOTO, Y
SAKUMA, E
机构：
[1] National Research Laboratory of Metrology, Tsukuba-shi, Ibaraki, 305
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1994年 / 33卷 / 3B期
关键词：
FREQUENCY CHAIN; ABSOLUTE FREQUENCY MEASUREMENT; CH4-STABILIZED HE-NE LASER; JOSEPHSON JUNCTION;
D O I：
10.1143/JJAP.33.1655
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A frequency-multiplication chain to the 3.39 mum CH4-stabilized He-Ne laser has been constructed using the Josephson point contact as a harmonic mixer. The Josephson harmonic mixer simplifies the chain because it can directly connect the 90 CHz microwave and the 4.25 THz far-infrared frequencies. Tracking oscillators, which track the beat notes by phase locking and regenerate clean signals, also have been developed to correctly count the beat frequencies. The frequency fluctuations of free-running lasers are canceled by counting the beat frequencies with coincident gate timing. The absolute frequency measurement of the He-Ne laser is reported with a standard deviation of about 5 kHz (tau = 8 s).
引用
收藏
页码：1655 / 1658
页数：4
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