Abstract
Doppler-free saturated absorption spectroscopy of gases in hollow-core fiber (HCF)-based cells can be used for realizing new compact, robust, and portable frequency standards. In this paper, methods for cancelling interferences resulting from the optical connections between standard fiber and HCF and other factors such as varying coupling to HCF modes are investigated. Laser power modulation with simultaneous detection of ac and dc signal is used to separate saturated absorption from interferences. In addition, a technique of two piezoelectric stack actuators stretching the fiber at different locations is described. The presented experimental results demonstrate that 99% interference attenuation is readily attainable with the techniques. Frequency comb-referenced measurement of saturated acetylene absorption features near 1.54 μm, with fiber length and power modulation, is presented. For comparison, measurements and results of the same acetylene fiber, using a system having pump and probe beams at mutually shifted frequencies, are also given.
| Original language | English |
|---|---|
| Article number | 7060653 |
| Pages (from-to) | 1595-1599 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Instrumentation and Measurement |
| Volume | 64 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jun 2015 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Frequency measurement standards
- infrared spectra
- interference cancellation
- measurement techniques
- metrology
- optical fiber
- spectroscopy
Cite this
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Interference Cancellation for Hollow-Core Fiber Reference Cells. / Seppä, Jeremias; Merimaa, Mikko; Manninen, Albert; Triches, Marco; Hald, Jan; Lassila, Antti.
In: IEEE Transactions on Instrumentation and Measurement, Vol. 64, No. 6, 7060653, 01.06.2015, p. 1595-1599.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Interference Cancellation for Hollow-Core Fiber Reference Cells
AU - Seppä, Jeremias
AU - Merimaa, Mikko
AU - Manninen, Albert
AU - Triches, Marco
AU - Hald, Jan
AU - Lassila, Antti
PY - 2015/6/1
Y1 - 2015/6/1
N2 - Doppler-free saturated absorption spectroscopy of gases in hollow-core fiber (HCF)-based cells can be used for realizing new compact, robust, and portable frequency standards. In this paper, methods for cancelling interferences resulting from the optical connections between standard fiber and HCF and other factors such as varying coupling to HCF modes are investigated. Laser power modulation with simultaneous detection of ac and dc signal is used to separate saturated absorption from interferences. In addition, a technique of two piezoelectric stack actuators stretching the fiber at different locations is described. The presented experimental results demonstrate that 99% interference attenuation is readily attainable with the techniques. Frequency comb-referenced measurement of saturated acetylene absorption features near 1.54 μm, with fiber length and power modulation, is presented. For comparison, measurements and results of the same acetylene fiber, using a system having pump and probe beams at mutually shifted frequencies, are also given.
AB - Doppler-free saturated absorption spectroscopy of gases in hollow-core fiber (HCF)-based cells can be used for realizing new compact, robust, and portable frequency standards. In this paper, methods for cancelling interferences resulting from the optical connections between standard fiber and HCF and other factors such as varying coupling to HCF modes are investigated. Laser power modulation with simultaneous detection of ac and dc signal is used to separate saturated absorption from interferences. In addition, a technique of two piezoelectric stack actuators stretching the fiber at different locations is described. The presented experimental results demonstrate that 99% interference attenuation is readily attainable with the techniques. Frequency comb-referenced measurement of saturated acetylene absorption features near 1.54 μm, with fiber length and power modulation, is presented. For comparison, measurements and results of the same acetylene fiber, using a system having pump and probe beams at mutually shifted frequencies, are also given.
KW - Frequency measurement standards
KW - infrared spectra
KW - interference cancellation
KW - measurement techniques
KW - metrology
KW - optical fiber
KW - spectroscopy
U2 - 10.1109/TIM.2015.2408800
DO - 10.1109/TIM.2015.2408800
M3 - Article
AN - SCOPUS:85027927698
VL - 64
SP - 1595
EP - 1599
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
SN - 0018-9456
IS - 6
M1 - 7060653
ER -