On the nth harmonic locking of the iodine stabilized He-Ne laser

Hu, Jianqiang; Ikonen, Erkki; Riski, K.

doi:10.1016/0030-4018(95)00366-g

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…The results are given in Table 2. The shift of the laser frequency using fifth harmonic stabilization is related to the asymmetry of the absorption line profile [11]. The minor differences in the measured frequencies of lasers MRI3 and BIPM7 with cells BIPM261 and BIPM38 indicate that the systematic differences between these two lasers are small.…”

Section: Experiments and Resultsmentioning

confidence: 98%

Comparison of¹²⁷I₂-stabilized He-Ne lasers at 633 nm between the MIKES and the BIPM

Hu¹,

Riski²,

Chartier³

et al. 1997

Metrologia

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The result of a comparison of 127 I 2 -stabilized He-Ne lasers at 633 nm between the MIKES and the BIPM is reported. The averaged frequency difference over absorption components d, e, f, g of the iodine molecular transition 11-5, R(127) between laser MRI3 and laser BIPM4 was with a standard uncertainty . The observed relative frequency stability determined by measurement of the Allan variance was for an averaging time of 5000 s. To investigate the repeatability of the lasers, iodine absorption cells were installed and measured in both laser MRI3 and laser BIPM7, taking laser BIPM4 as the reference. The frequency stabilization of laser MRI3 at the fifth harmonic of the modulation was tested.

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Section: Experiments and Resultsmentioning

confidence: 98%

Comparison of¹²⁷I₂-stabilized He-Ne lasers at 633 nm between the MIKES and the BIPM

Hu¹,

Riski²,

Chartier³

et al. 1997

Metrologia

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“…The frequency of the laser has been observed to increase when the fifth-harmonic technique (FHT) is used. The FHT has also been reported to reduce the effects of the modulation amplitude, intracavity power and iodine pressure on the frequency shift and therefore improve the frequency reproducibility [1,5]. In the 1997 practical realization of the definition of the metre [6], the frequency value is given for the 633 nm He-Ne laser using an internal iodine cell and stabilized by the third-harmonic technique (THT).…”

Section: Introductionmentioning

confidence: 99%

International comparison of He-Ne lasers stabilized with¹²⁷I₂at = 633 nm: Comparison of the fifth- and third-harmonic locking techniques

Lassila¹,

Riski²,

Hu³

et al. 2000

Metrologia

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An international comparison of 127I2-stabilized 633 nm He-Ne lasers locked either by the fifth- or the third-harmonic technique was carried out at the Finnish Centre for Metrology and Accreditation (MIKES) in September 1998. The participating laboratories were the MIKES; the Metrology Research Institute, Helsinki University of Technology (HUT); the Chinese National Institute of Metrology (NIM); the Czech Metrological Institute (CMI); the D. I. Mendeleyev Institute for Metrology (VNIIM); and the Bureau International des Poids et Mesures (BIPM). Raw measured frequency differences between lasers were in the following ranges: −5.2 kHz to +11.9 kHz and −5.8 kHz to +4.9 kHz for the third- and fifth-harmonic locking techniques, respectively. The frequency offsets between the third- and fifth-harmonic techniques for different components (d to g) were in the range 26 kHz to 35 kHz. The relative frequency stability of lasers given by the Allan standard deviations reached 2.6 × 10−13 for two lasers using the third harmonic and only 1 × 10−12 for the same lasers using the fifth harmonic for a 2000 s sampling time. This comparison is part of the ongoing laser comparison carried out under the auspices of the Consultative Committee for Length (CCL, formerly CCDM) of the Comité International des Poids et Mesures (CIPM); it is also a EUROMET project (No. 462).

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Frequency stabilization of a diode laser to Doppler-free spectrum of molecular iodine at 633 nm

Talvitie¹,

Merimaa²,

Ikonen³

1998

Optics Communications

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On the nth harmonic locking of the iodine stabilized He-Ne laser

Cited by 9 publications

References 14 publications

Comparison of¹²⁷I₂-stabilized He-Ne lasers at 633 nm between the MIKES and the BIPM

Comparison of¹²⁷I₂-stabilized He-Ne lasers at 633 nm between the MIKES and the BIPM

International comparison of He-Ne lasers stabilized with¹²⁷I₂at = 633 nm: Comparison of the fifth- and third-harmonic locking techniques

Frequency stabilization of a diode laser to Doppler-free spectrum of molecular iodine at 633 nm

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On the nth harmonic locking of the iodine stabilized He-Ne laser

Cited by 9 publications

References 14 publications

Comparison of127I2-stabilized He-Ne lasers at 633 nm between the MIKES and the BIPM

Comparison of127I2-stabilized He-Ne lasers at 633 nm between the MIKES and the BIPM

International comparison of He-Ne lasers stabilized with127I2at = 633 nm: Comparison of the fifth- and third-harmonic locking techniques

Frequency stabilization of a diode laser to Doppler-free spectrum of molecular iodine at 633 nm

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Comparison of¹²⁷I₂-stabilized He-Ne lasers at 633 nm between the MIKES and the BIPM

Comparison of¹²⁷I₂-stabilized He-Ne lasers at 633 nm between the MIKES and the BIPM

International comparison of He-Ne lasers stabilized with¹²⁷I₂at = 633 nm: Comparison of the fifth- and third-harmonic locking techniques