Creation of arbitrary time-sequenced line spectra with an electro-optic phase modulator

Rogers, C. E.; Carini, J. L.; Pechkis, J. A.; Gould, Phillip L.

doi:10.1063/1.3611005

Cited by 13 publications

(4 citation statements)

References 18 publications

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“…Higher speed electronics would enable faster chirp rates and larger chirp ranges. Extended chirp ranges could also be achieved by using the serrodyne technique [35] to suddenly shift the frequency during the chirp. Recent developments in optical spectral engineering [36] could potentially yield more faithful production of desired chirps by compensating for imperfections in electrical and optical system responses.…”

Section: Discussionmentioning

confidence: 99%

Amplification of arbitrary frequency chirps of pulsed light on nanosecond timescales

Clarke¹,

Gould²

2021

Preprint

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We have developed a system for producing amplified pulses of frequency-chirped light at 780 nm on nanosecond timescales. The system starts with tunable cw laser light and employs a pair of fiber-based phase modulators, a semiconductor optical amplifier, and a tapered amplifier to achieve chirp rates exceeding 3 GHz/10 ns and peak powers greater than 1 W. Driving the modulators with an arbitrary waveform generator enables arbitrary chirp shapes, such as two-frequency linear chirps. We overcome the optical power limitations of the modulators by duty cycling and avoid unseeded operation of the tapered amplifier by multiplexing the chirped pulses with "dummy" light from a separate diode laser.

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Section: Discussionmentioning

confidence: 99%

Amplification of arbitrary frequency chirps of pulsed light on nanosecond timescales

Clarke¹,

Gould²

2021

Preprint

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“…2). In principle, such spectra could be generated using combinations of frequency shifting, spectral broadening, spectral engineering based on serrodynes [40] or holographic algorithms [41]. However, bulk setups to achieve this are complex and a large fraction of laser power will inevitably be lost into off-resonant spectral components, or drive unwanted transitions nearby.…”

Section: Optical Cyclingmentioning

confidence: 99%

A laser cooling scheme for precision measurements using barium monofluoride (137Ba19F) molecules

Kogel,

Rockenhäuser,

Albrecht

et al. 2021

Preprint

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We theoretically investigate the laser cooling of fermionic barium monofluoride ( 137 BaF) molecules, which are promising candidates for precision studies of weak parity violation and nuclear anapole moments. This molecular species features two nuclear spins, resulting in a hyperfine structure that is considerably more complicated than the one found in the usual laser-cooled diatomics. We use optical Bloch equations and rate equations to show that optical cycling, sub-Doppler cooling and bichromatic forces can all be realized under realistically achievable experimental conditions.

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“…Simple solutions to generate multiple frequencies are not always available. One approach involves stitching together multiple serrodyne waveforms to create multiple frequencies [20]. The desired power of each frequency component can be controlled via the duration of each serrodyne.…”

Section: B Creating Multiple Frequenciesmentioning

confidence: 99%

Synthesizing Optical Spectra using Computer-Generated Holography Techniques

Holland,

Lu,

Cheuk

2020

Preprint

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Experimental control and detection of atoms and molecules often rely on optical transitions between different electronic states. In many cases, substructure such as hyperfine or spin-rotation structure leads to the need for multiple optical frequencies spaced by MHz to GHz. The task of creating multiple optical frequencies -optical spectral engineering -becomes challenging when the number of frequencies becomes large, a situation that one could encounter in complex molecules and atoms in large magnetic fields. In this work, we present a novel method to synthesize arbitrary optical spectra by modulating a monochromatic light field with a time-dependent phase generated through computer-generated holography techniques. Our method is compatible with non-linear optical processes such as sum frequency generation and second harmonic generation. Additional requirements that arise from the finite lifetimes of excited states can also be satisfied in our approach. As a proof-of-principle demonstration, we generate spectra suitable for cycling photons on the X-B transition in CaF, and verify via Optical Bloch Equation simulations that one can achieve high photon scattering rates, which are important for fluorescent detection and laser cooling. Our method could offer significant simplifications in future experiments that would otherwise be prohibitively complex.

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Creation of arbitrary time-sequenced line spectra with an electro-optic phase modulator

Cited by 13 publications

References 18 publications

Amplification of arbitrary frequency chirps of pulsed light on nanosecond timescales

Amplification of arbitrary frequency chirps of pulsed light on nanosecond timescales

A laser cooling scheme for precision measurements using barium monofluoride (137Ba19F) molecules

Synthesizing Optical Spectra using Computer-Generated Holography Techniques

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