Wavelength calibration with PMAS at 3.5 m Calar Alto Telescope using a tunable astro-comb

Boggio, J.M. Chávez; Fremberg, T.; Sandín, C.; Zajnulina, Marina; Kelz, Andreas; Giannone, Domenico; Rutowska, Monika; Moralejo, B.; Roth, Martin; Wysmolek, Mateusz; Sayınc, Hakan

doi:10.1016/j.optcom.2018.01.007

Cited by 8 publications

(2 citation statements)

References 35 publications

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“…A series of tests demonstrated not only that the comb delivered significantly more emission lines than a comparison Neon spectral line lamp, but also that equidistancy of the comb lines was confirmed with an absolute accuracy of 0.4 pm. Furthermore, on-sky tests were conducted using the Potsdam Multi-Aperture Spectrograph (PMAS) [9] at the 3.5 m Calar Alto Telescope [38]. The second approach was subsequently studied, and first results reported for frequency combs in a silicon nitride micro-ring resonator, achieving an ultra-stable repetition frequency of 28.55 GHz [39], Fig.…”

Section: Pic Ring Resonators In Astronomical Frequency Combs For Prec...mentioning

confidence: 99%

Astrophotonics: photonic integrated circuits for astronomical instrumentation

Roth

Madhav

Stoll

et al. 2023

Integrated Optics: Devices, Materials, and Technologies XXVII

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Photonic Integrated Circuits (PIC) are best known for their important role in the telecommunication sector, e.g. high speed communication devices in data centers. However, PIC also hold the promise for innovation in sectors like life science, medicine, sensing, automotive etc. The past two decades have seen efforts of utilizing PIC to enhance the performance of instrumentation for astronomical telescopes, perhaps the most spectacular example being the integrated optics beam combiner for the interferometer GRAVITY at the ESO Very Large Telescope. This instrument has enabled observations of the supermassive black hole in the center of the Milky Way at unprecedented angular resolution, eventually leading to the Nobel Price for Physics in 2020. Several groups worldwide are actively engaged in the emerging field of astrophotonics research, amongst them the innoFSPEC Center in Potsdam, Germany. We present results for a number of applications developed at innoFSPEC, notably PIC for integrated photonic spectrographs on the basis of arrayed waveguide gratings and the PAWS demonstrator (Potsdam Arrayed Waveguide Spectrograph), PIC-based ring resonators in astronomical frequency combs for precision wavelength calibration, discrete beam combiners (DBC) for large astronomical interferometers, as well as aperiodic fiber Bragg gratings for complex astronomical filters and their possible derivatives in PIC.

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Section: Pic Ring Resonators In Astronomical Frequency Combs For Prec...mentioning

confidence: 99%

Astrophotonics: photonic integrated circuits for astronomical instrumentation

Roth

Madhav

Stoll

et al. 2023

Integrated Optics: Devices, Materials, and Technologies XXVII

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“…Optical frequency combs (OFCs) have initiated a new era of time and frequency metrology by transferring the accuracy and stability of an optical reference (e.g., an optical clock system) to other wavelengths of interest. [1] With rapid development, OFCs have found a broad range of applications, including pure microwave generation, [2] astronomical spectrograph calibration, [3] and precision laser frequency spectroscopy. [4] Especially, cavity ring-down spectroscopy (CRDS) [5] is the widely used technique of precision laser frequency spectroscopy.…”

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confidence: 99%

An All-Polarization-Maintaining Multi-Branch Optical Frequency Comb for Highly Sensitive Cavity Ring-Down Spectroscopy*

Ning¹,

Hou²,

Fan³

et al. 2020

Chinese Phys. Lett.

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We demonstrate a multi-branch all polarization-maintaining Er:fiber frequency comb with five application ports for precise measurement of atomic/molecular transition frequencies in the near-infrared region. A fully stabilized Er:fiber frequency comb with a nonlinear amplifying loop mirror is achieved. The in-loop relative instability of stabilized carrier-envelope-offset frequency is 5.6 × 10−18 at 1 s integration time, while that of the repetition rate is well below 1.8 × 10−12 limited by the measurement noise floor of the commercial frequency counter. Five application ports are individually optimized for applications with different wavelengths (1064 nm, 1083 nm, 1380 nm, 1637 nm and 1750 nm). The beat note between the optical frequency comb and continuous laser exhibits the signal-to-noise ratio of at least 30 dB at a resolution bandwidth of 100 kHz. The in-loop frequency instability of the comb is evaluated to be good enough for measurement of rotation-resolved transitions of molecules below 1 kHz resolution.

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20 GHz fiber-integrated femtosecond pulse and supercontinuum generation with a resonant electro-optic frequency comb

Sekhar,

Fredrick,

Carlson

et al. 2023

APL Photonics

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Frequency combs with mode spacing of 10–20 GHz are critical for increasingly important applications such as astronomical spectrograph calibration, high-speed dual-comb spectroscopy, and low-noise microwave generation. While electro-optic modulators and microresonators can provide narrowband comb sources at this repetition rate, a significant remaining challenge is a means to produce pulses with sufficient peak power to initiate nonlinear supercontinuum generation spanning hundreds of terahertz (THz) as required for self-referencing. Here, we provide a simple, robust, and universal solution to this problem using off-the-shelf polarization-maintaining amplification and nonlinear fiber components. This fiber-integrated approach for nonlinear temporal compression and supercontinuum generation is demonstrated with a resonant electro-optic frequency comb at 1550 nm. We show how to readily achieve pulses shorter than 60 fs at a repetition rate of 20 GHz. The same technique can be applied to picosecond pulses at 10 GHz to demonstrate temporal compression by 9× and achieve 50 fs pulses with a peak power of 5.5 kW. These compressed pulses enable flat supercontinuum generation spanning more than 600 nm after propagation through multi-segment dispersion-tailored anomalous-dispersion highly nonlinear fibers or tantala waveguides. The same 10 GHz source can readily achieve an octave-spanning spectrum for self-referencing in dispersion-engineered silicon nitride waveguides. This simple all-fiber approach to nonlinear spectral broadening fills a critical gap for transforming any narrowband 10–20 GHz frequency comb into a broadband spectrum for a wide range of applications that benefit from the high pulse rate and require access to the individual comb modes.

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Wavelength calibration with PMAS at 3.5 m Calar Alto Telescope using a tunable astro-comb

Cited by 8 publications

References 35 publications

Astrophotonics: photonic integrated circuits for astronomical instrumentation

Astrophotonics: photonic integrated circuits for astronomical instrumentation

An All-Polarization-Maintaining Multi-Branch Optical Frequency Comb for Highly Sensitive Cavity Ring-Down Spectroscopy*

20 GHz fiber-integrated femtosecond pulse and supercontinuum generation with a resonant electro-optic frequency comb

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