“Loop Stabilized” Improved Transfer Cavity-Based Laser Frequency Stabilization

Roy, Amit; Sharma, Lakhi; Panja, Subhasis; De, Sun

doi:10.1109/jqe.2022.3150428

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…Laser locking is a useful technique for stabilizing laser’s output frequency with respect to a reference transition frequency 28 and very commonly used in the precision experiments. Locking a laser to a particular reference peak requires a feedback control in terms of an error signal, which is proportional to the offset or detuning of the frequency from its desired value, i.e., the reference frequency.…”

Section: Resultsmentioning

confidence: 99%

Frequency stabilization of multiple lasers to a reference atomic transition of Rb

Utreja

Rathore

Das

et al. 2022

Sci Rep

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Modern atomic clocks based on the interrogation of an atomic transitions in the optical regions require multiple lasers at different wavelength for producing atomic ions, trapping and laser cooling of neutral atoms or atomic ions. In order to achieve highest efficiency for laser cooling or any other atomic transition, frequencies of each of the lasers involved need to be stabilized by mitigating its drifts or fluctuations arise due to ambient temperature variation or other kind of perturbations. The present article describes simultaneous frequency stabilization of multiple number of lasers, required for production and laser cooling of ytterbium (171Yb) ions, to a reference transition frequency of rubidium (Rb) atoms. In this technique, a diode laser operating at ~ 780 nm is frequency stabilized to one of the Doppler broadening-free absorption peak of rubidium atoms (85Rb) and then used as a reference frequency for calibrating a wavelength meter and subsequent simultaneous frequency stabilization of four lasers operating at different wavelengths.

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Section: Resultsmentioning

confidence: 99%

Frequency stabilization of multiple lasers to a reference atomic transition of Rb

Utreja

Rathore

Das

et al. 2022

Sci Rep

Self Cite

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“…Another widespread technique is frequency locking to a Fabry-Perot cavity [10][11][12] by virtue of the Pound-Drever-Hall (PDH) frequency stabilization method [13,14]. This is further modified to suit the transfer cavity technique, which allows the simultaneous stabilization of multiple laser frequencies [15][16][17][18]. Software-based locking is also another ready-to-use approach that is in use in various experiments [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Stabilizing Frequency of a Diode Laser to a Reference Transition of Molecular Iodine through Modulation Transfer Spectroscopy

Sharma,

Roy,

Panja

et al. 2023

Atoms

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We report the frequency stabilization of an external cavity diode laser (ECDL) to a reference molecular iodine (I2) transition at 13,531.18 cm−1 (739.03382 nm). Using the Modulation Transfer Spectroscopy (MTS) method for the highly sensitive detection of weak absorption signals, the Doppler-free absorption peaks of I2 corresponding to the hot band transition R(78) (1–11) are resolved. The ECDL’s frequency is stabilized with respect to one of the lines lying within the reference absorption band. For this, the iodine vapor cell is heated to 450 °C and the corresponding circularly polarized pump and probe beam powers are maintained at 10 mW and 1 mW, respectively, to avoid power broadening. The short (100 ms) and long-term (50 h) linewidths of the frequency stabilized laser are measured to be 0.75(3) MHz and 0.5(2) MHz, respectively, whereas the natural linewidth of the specific I2-transitions lie within a range of tens of MHz.

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Dynamic Fabry-Pérot cavity stabilization technique for atom-cavity experiments

Dinesh,

Thakar,

Gokul

et al. 2024

EPJ Techn Instrum

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We present a stabilization technique developed to lock and dynamically tune the resonant frequency of a moderate finesse Fabry-Pérot (FP) cavity used in precision atom-cavity quantum electrodynamics (QED) experiments. Most experimental setups with active stabilization either operate at one fixed resonant frequency or use transfer cavities to achieve the ability to tune the resonant frequency of the cavity. In this work, we present a simple and cost-effective solution to actively stabilize an optical cavity while achieving a dynamic tuning range of over 100 MHz with a precision under 1 MHz. Our unique scheme uses a reference laser locked to an electro-optic modulator (EOM) shifted saturation absorption spectroscopy (SAS) signal. The cavity is locked to the PDH error signal obtained from the dip in the reflected intensity of this reference laser. Our setup provides the feature to efficiently tune the resonant frequency of the cavity by only changing the EOM drive without unlocking and re-locking either the reference laser or the cavity. We present measurements of precision control of the resonant cavity frequency and vacuum Rabi splitting (VRS) to quantify the stability achieved and hence show that this technique is suitable for a variety of cavity QED experiments.

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“Loop Stabilized” Improved Transfer Cavity-Based Laser Frequency Stabilization

Cited by 3 publications

References 18 publications

Frequency stabilization of multiple lasers to a reference atomic transition of Rb

Frequency stabilization of multiple lasers to a reference atomic transition of Rb

Stabilizing Frequency of a Diode Laser to a Reference Transition of Molecular Iodine through Modulation Transfer Spectroscopy

Dynamic Fabry-Pérot cavity stabilization technique for atom-cavity experiments

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