Frequency tripled 1.5 µm telecom laser diode stabilized to iodine hyperfine line in the 10−15 range

Philippe, Charles; Targat, Rodolphe Le; Holleville, David; Lours, M.; Minh-Pham, Tuan; Hrabina, Jan; Burck, Frédéric Du; Wolf, Peter; Acef, O.

doi:10.1109/eftf.2016.7477827

Cited by 10 publications

(9 citation statements)

References 16 publications

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“…The small part of this green laser light was fed into a classic modulation transfer spectroscopy setup [ 33 , 36 ] and the laser frequency was locked to detect the hyperfine transition a 1 of the R(34) (44-0) line in the tested iodine cell (double-pass arrangement). The absolute value of the fundamental IR range laser frequency was detected by the beat-note measurement with the stabilized optical frequency comb [ 37 ]. The comb is referenced by an ultra-stable cylindrical optical cavity made of ULE (ultra-low-expansion glass) with a fractional frequency stability at the 1 × 10 −15 level order, well below the expected stability of the measured iodine-stabilized laser [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

Iodine Absorption Cells Purity Testing

Hrabina

Zucco

Philippe

et al. 2017

Sensors

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This article deals with the evaluation of the chemical purity of iodine-filled absorption cells and the optical frequency references used for the frequency locking of laser standards. We summarize the recent trends and progress in absorption cell technology and we focus on methods for iodine cell purity testing. We compare two independent experimental systems based on the laser-induced fluorescence method, showing an improvement of measurement uncertainty by introducing a compensation system reducing unwanted influences. We show the advantages of this technique, which is relatively simple and does not require extensive hardware equipment. As an alternative to the traditionally used methods we propose an approach of hyperfine transitions’ spectral linewidth measurement. The key characteristic of this method is demonstrated on a set of testing iodine cells. The relationship between laser-induced fluorescence and transition linewidth methods will be presented as well as a summary of the advantages and disadvantages of the proposed technique (in comparison with traditional measurement approaches).

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Section: Resultsmentioning

confidence: 99%

Iodine Absorption Cells Purity Testing

Hrabina

Zucco

Philippe

et al. 2017

Sensors

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“…3.b). Subsequently, the frequency stability evaluation of our iodine stabilized laser is not affected [13]. The linewidth of the optical beat note between the two infrared laser beams (OFR and Iodine-OFS) is less than 10 kHz, detected using a large bandwidth InGaAs photodetector.…”

Section: Icso 2018 International Conference On Space Opticsmentioning

confidence: 89%

“…In this work, we propose to take advantage of numerous strong and much narrow lines located in the 510 nm-520 nm range [6], barely a few GHz apart, to frequency stabilize any Telecom laser source emitting in the C Band of the optical domain, after a frequency tripling process [12]. In such a way, ultra-compact and mainly fibered OFS can be set up, combining superior metrological qualities of iodine transitions in this green range to narrow linewidth lasers and various optical fibered components who exhibit a high technological readiness level (TRL) existing in the Telecom band [13].…”

Section: Introductionmentioning

confidence: 99%

Compact and Transportable Iodine Frequency-stabilized laser

Barbarat¹,

Gillot²,

Alvarez-Martinez³

et al. 2019

International Conference on Space Optics — ICSO 2018

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We report on a compact optical frequency standard (OFS) based on a Telecom laser diode operating at ~ 1542 nm, frequency stabilized to a narrow iodine transition located in the green range of the visible domain (~514 nm), after a highly efficient frequency tripling process. We use two cascaded waveguide Lithium Niobate nonlinear crystals for the third harmonic generation process (THG), resulting in a harmonic power of 300 mW in the green range (@ 3) using 800 mW of infrared power (@ ). This result corresponds to an optical conversion efficiency P/P > 36 % which is -to our knowledge-the best result ever reported for a third harmonic process in continuous wave regime (CW). This process uses only 20 W of total consumption power, which can be drastically reduced, knowing that less than 10% of that green power level is needed for the iodine Doppler free spectroscopy, and consequently for the frequency stabilization purpose. We have already demonstrated a frequency stability of 2.9 x10 -14  -1/2 conferred to a laser diode operating at ~ 1542 nm, using the a1 hyperfine component of the R34 [44-0] located at ~ 514 nm. This corresponds to an amplitude spectral density of the residual frequency fluctuations < 10 Hz/√Hz. We plan to extend this approach to set up a new OFS by using a narrow linewidth fiber-laser emitting at ~ 1597 nm, which will be used for the phase-locking of a 1064 nm laser. Thus, this OFS, compact and mainly fibered, will perform the same role as that of a rigid optical cavity, widely used to stabilize 1064 nm lasers, involved in various terrestrial applications or space missions. The compact design of the whole setup will make it easily transportable to different sites and could be readily used as an ultra-stable frequency reference.

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“…To evaluate the model-independent variation in µ, it is preferable to measure the variation in the ratio of the molecular vibrational-rotational transition frequencies to the 1 S 0 -3 P 0 transition frequencies of a 87 Sr atom or an 27 Al + ion, which have very low sensitivity to µ and α [11] and measurement uncertainty less than 10 -17 [4][5] [6]. However, molecular transitions have never been measured with an uncertainty lower than 10 -14 , although a stability of 6 × 10 −15 was obtained with an I 2 -stabilized diode laser [12].…”

Section: Introductionmentioning

confidence: 99%

Accuracy estimation of the O216+ transition frequencies targeting the search for the variation in the proton-electron mass ratio

Kajita¹

2017

Phys. Rev. A

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In this paper, we estimate the Stark and Zeeman shifts in the transition frequencies of the 16 O2 + molecular ion, as a step for the search for the variation in the proton-to-electron mass ratio µ. The X 2 Π v = 21 − a 4 Π v = 0 or the X 2 Πv = 21 − a 4 Π v = 1 transition frequencies (THz region) of the 16 O2 + molecular ion have particularly high sensitivity to the variation in µ. Note also that the Stark shift in the 16 O2 + transition frequencies is expected to be much smaller than that for heteronuclear diatomic molecules. However, the actual systematic uncertainties for the 16 O2 + transition frequencies have never been estimated. We estimated the Stark and Zeeman shifts in the different 16 O2 + transition frequencies. When the molecular ions in a string crystal formed in a linear trap (trap electric field < 0.1 V/cm, and Stark shift < 10 -20 ) are used, the X 2 Π 1/2 (v, J) = (0, 1/2) − (v ′ , 1/2)(v ′ ≥ 1) transition frequencies are most advantageous for the search for the variation in µ ∆µ/µ < 10 −17 because the Zeeman shift is easily suppressed to lower than 10 -18 and the electric quadrupole shift is zero. On the other hand, the X 2 Π 1/2 (v, J) = (21, 1/2) − a 4 Π 1/2 (v, J) = (0, 1/2) transition frequency has another merit that the positive Stark shift induced by the trap electric field can be canceled by the quadratic Doppler shift. Therefore, the measurement using molecular ions in a Coulomb crystal broadened in the radial direction is also possible, when the Zeeman shift is effectively eliminated. PACS numbers: 32.60.+i, 06.20.Dk, 33.20Ea

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Frequency tripled 1.5 µm telecom laser diode stabilized to iodine hyperfine line in the 10−15 range

Cited by 10 publications

References 16 publications

Iodine Absorption Cells Purity Testing

Iodine Absorption Cells Purity Testing

Compact and Transportable Iodine Frequency-stabilized laser

Accuracy estimation of the O216+ transition frequencies targeting the search for the variation in the proton-electron mass ratio

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