Characterizing Fast Arbitrary CW Waveforms With 1500 THz/s Instantaneous Chirps

被引：27

作者：

Coddington, Ian ^{[1
]}

Giorgetta, Fabrizio R. ^{[1
]}

Baumann, Esther ^{[1
]}

Swann, William C. ^{[1
]}

Newbury, Nathan R. ^{[1
]}

机构：

[1] NIST, Boulder, CO 80305 USA

来源：

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2012年 / 18卷 / 01期

基金：

瑞士国家科学基金会;

关键词：

Frequency combs; laser tuning; metrology; ABSOLUTE MODE NUMBER; FREQUENCY-COMB; FIBER-LASER; NOBEL LECTURE; SPECTROSCOPY; PRECISE; PERFORMANCE;

D O I：

10.1109/JSTQE.2011.2114875

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The instantaneous frequency of a rapidly tuned continuous-wave (CW) laser is measured through linear optical sampling against dual-frequency combs. This dual-comb interferometer determines the instantaneous frequency of the CW laser during a quasi-sinewave frequency sweep of 3 THz amplitude with a 10 ms period. More complicated waveforms are also measured with instantaneous chirps exceeding 1500 THz/s (12 000 nm/s). The uncertainty is 1.5MHz at 20 ns time resolution, averaging down to 5 kHz at 5 mu s time resolution. The absolute frequency accuracy can be calibrated to within 2.5 kHz provided there is a brief period (<1ms) of low laser chirp (<160 GHz/s) during the waveform measurement to allow for a dual-comb Vernier measurement of the absolute frequency, modulo 3 THz. This approach allows for the characterization of arbitrary CW waveforms with instantaneous frequencies that change rapidly and over wide optical bandwidth.

引用

页码：228 / 238

页数：11

共 47 条

[11] Rapid and precise absolute distance measurements at long range [J].