Mid-infrared fibre-based optical comb

Maddaloni, P.; Malara, P.; Gagliardi, G.; Natale, P. De

doi:10.1088/1367-2630/8/11/262

Cited by 72 publications

(52 citation statements)

References 23 publications

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“…EOM based frequency combs [61,62] offer a promising path to suppress phase noise but the flat spectra remains a challenge. Moreover, to realize the full potential of this approach, one would like these spectra to extend well beyond the gain region of available laser sources and into the mid-infrared, long wave-infrared and THz regions [1,21]. There have certainly been advances in all these areas, but much more source development is needed to support dual comb spectroscopy, particularly in view of the usual tradeoffs faced between expanding the spectral coverage and retaining high levels of phase coherence and low relative intensity noise [63][64][65].…”

Section: Ivb Future Improvementsmentioning

confidence: 99%

“…However, the quality factor (defined as the product of resolution elements and SNR [17]) achieved at 1550 nm and 200 MHz resolution is comparable (within 50%) to highresolution FTS data in the same spectral region [18,19] (scaled to the same resolution assuming an SNR proportional to the square of the spectral resolution [20]). While the demonstration here is still limited to a relatively narrow, 9 THz, spectral region, the basic approach outlined here should work as well with much broader comb sources and, more importantly, with comb sources further out in the mid and long-wave infrared spectral regions, as they are developed [21,22].…”

Section: Introductionmentioning

confidence: 99%

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Coherent dual-comb spectroscopy at high signal-to-noise ratio

2010

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Two coherent frequency combs are used to measure the full complex response of a sample in a configuration analogous to a dispersive Fourier transform spectrometer, infrared time domain spectrometer, or a multiheterodyne laser spectrometer. This dual comb spectrometer retains the frequency accuracy and resolution of the reference underlying the stabilized combs. We discuss the specific design of our coherent dual-comb spectrometer and demonstrate the potential of this technique by measuring the overtone vibration of hydrogen cyanide, centered at 194 THz (1545 nm). We measure the fully normalized, complex response of the gas over a 9 THz bandwidth at 220 MHz frequency resolution yielding 41,000 resolution elements. The average spectral signal-to-noise ratio (SNR) over the 9 THz bandwidth is 2,500 for both the magnitude and phase of the measured spectral response and the peak SNR is 4,000. This peak SNR corresponds to a fractional absorption sensitivity of 0.05% and a phase sensitivity of 250 microradians. As the spectral coverage of combs expands, coherent dual-comb spectroscopy could provide high frequency accuracy and resolution measurements of a complex sample response across a range of spectral regions.Work of U.S. government, not subject to copyright.

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Section: Ivb Future Improvementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coherent dual-comb spectroscopy at high signal-to-noise ratio

2010

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“…6 Different approaches have been pursued to obtain mid-infrared frequency combs. [7][8][9][10][11] One possibility is the use of mode-locked lasers, which are also of considerable interest for their ability to generate ultra-short light pulses at high repetition rates. Mode locking of lasers has been a subject of intense research because of the complex nonlinear dynamics involving the self-organization of many laser modes.…”

confidence: 99%

Optimizing the active region of interband cascade lasers for passive mode-locking

et al. 2017

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The work proposes possible designs of active regions for a mode-locked interband cascade laser emitting in the mid infrared. For that purpose we investigated the electronic structure properties of respectively modified GaSb-based type II W-shaped quantum wells, including the effect of external bias in order to simultaneously fulfil the requirements for both the absorber as well as the gain sections of a device. The results show that introducing multiple InAs layers in type II InAs/GaInSb quantum wells or introducing a tensely-strained GaAsSb layer into “W-shaped” type II QWs offers significant difference in optical transitions’ oscillator strengths (characteristic lifetimes) of the two oppositely polarized parts of such a laser, being promising for utilization in mode-locked devices.

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“…For example, a 1.55 µm comb may be mixed with a 1.06 µm. As a result of this process, the comb is converted into 3.39 µm [47].…”

Section: Extending the Spectral Coverage Of Frequency Combsmentioning

confidence: 99%

Fiber-based laser frequency combs

Soboń¹,

Abramski²

2012

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. For the last decade a very attractive field of laser physics, namely the optical frequency comb technique, has been intensively developed. Fiber lasers play particular role in that area. The motivation of their development is obtaining broadband comb systems with well-defined and stable mods (comb teeth). This paper presents a basic overview devoted to the fiber-based optical frequency combs.

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Mid-infrared fibre-based optical comb

Cited by 72 publications

References 23 publications

Coherent dual-comb spectroscopy at high signal-to-noise ratio

Coherent dual-comb spectroscopy at high signal-to-noise ratio

Optimizing the active region of interband cascade lasers for passive mode-locking

Fiber-based laser frequency combs

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