Suppression of residual amplitude modulation of ADP electro-optical modulator in Pound-Drever-Hall laser frequency stabilization

Li, Jin

doi:10.1016/j.optlastec.2020.106758

Cited by 10 publications

(4 citation statements)

References 32 publications

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“…4a). For the PDH method, although recent engineering of RAM levels that are almost compatible with our obtained instabilities were reported [34,35] (Fig. 4a, dashed and dotted lines respectively), a demonstration of an actual laser-cavity locking at such levels had not been reported.…”

mentioning

confidence: 49%

Laser-cavity locking at the $10^{-7}$ instability scale utilizing beam elipticity

Diorico¹,

Zhutov²,

Hosten³

2022

Preprint

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Ultrastable lasers form the back bone of precision measurements in science and technology. Such lasers attain their stability through frequency locking to reference cavities. State-of-the-art locking performances to date had been achieved using frequency-modulation based methods, complemented with active drift cancellation systems. We demonstrate an all passive, modulation-free laser-cavity locking technique (squash locking) that utilizes changes in beam ellipticity for error signal generation, and a coherent polarization post-selection for noise resilience. By comparing two identically built proof-of-principle systems, we show a frequency locking instability of 5 × 10 −7 relative to the cavity linewidth at 10 s averaging. The results surpass the demonstrated performances of methods engineered over the last five decades, opening a new path for further advancing the precision and simplicity of laser frequency stabilization.

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confidence: 49%

Laser-cavity locking at the $10^{-7}$ instability scale utilizing beam elipticity

Diorico¹,

Zhutov²,

Hosten³

2022

Preprint

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“…This is consistent with the fact that V ε (ϕ d + π/2) monitors the RAM amplitude, which is proportional to sin(δϕ) according to Eqs. (15)(16)(17) (see also the Supplementary). Again, the theoretical curves perfectly agree with the measured ones.…”

Section: A Observation Of the Two Error Signalsmentioning

confidence: 99%

“…This method has been shown to be very efficient when there is no polarization dependent component on the two beam paths, for instance when both beams propagate in free space [4,8,11]. Several studies, based on this technique, propose complementary approaches to actively or passively compensate the RAM effect [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

New method for residual amplitude modulation control in fibered optical experiments

Descampeaux,

Feugnet,

Bretenaker

2021

Preprint

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When locking the frequency of a laser to an optical cavity resonance, the residual amplitude modulation (RAM), which accompanies the phase modulation necessary to build the error signal, is a major limitation to the frequency stability. We show that the popular method demonstrated by Wong and Hall to cancel this effect, and based on the measurment of the RAM using an auxiliary detector, is not suitable in the case of optical setups including birefringent elements and polarization dependent losses, such as guided-wave optical systems. We propose and demonstrate a new method, using a single photodetector, to generate the two error signals and demonstrate its usefulness in the case of fibered systems.

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“…Passive suppression of RAM in EOMs has been demonstrated using wedged crystal ends [26][27][28][29], and RAM can also be actively suppressed by acting on the EOM DC bias [20,30], the EOM temperature [31], or both [32]. Using digital electronics, we combine the stabilization of the laser power and EOM temperature to an active RAM suppression servo acting on the EOM DC input.…”

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confidence: 99%

Residual amplitude modulation at the $10^{-7}$ level for ultra-stable lasers

Gillot,

Tetsing-Talla,

Denis

et al. 2022

Preprint

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Suppression of residual amplitude modulation of ADP electro-optical modulator in Pound-Drever-Hall laser frequency stabilization

Cited by 10 publications

References 32 publications

Laser-cavity locking at the $10^{-7}$ instability scale utilizing beam elipticity

Laser-cavity locking at the $10^{-7}$ instability scale utilizing beam elipticity

New method for residual amplitude modulation control in fibered optical experiments

Residual amplitude modulation at the $10^{-7}$ level for ultra-stable lasers

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