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Supercontinuum generation in angle-etched diamond waveguides
Amirhassan Shams-Ansari, Pawel Latawiec, Yoshitomo Okawachi +8
We experimentally demonstrate on-chip supercontinuum generation in the visible region in angle etched diamond waveguides. We measure an output spectrum spanning 670 nm to 920 nm in…
Frequency comb spectroscopy
Nathalie Picqué, Theodor W. Hänsch
A laser frequency combs is a broad spectrum composed of equidistant narrow lines. Initially invented for frequency metrology, such combs enable new approaches to spectroscopy over…
Mid-infrared feed-forward dual-comb spectroscopy at 3 m
Zaijun Chen, Theodor W. Hänsch, Nathalie Picqué
Mid-infrared high-resolution spectroscopy has proven an invaluable tool for the study of the structure and dynamics of molecules in the gas phase. The advent of frequency combs adv…
Doppler-free Fourier transform spectroscopy
Samuel A. Meek, Arthur Hipke, Guy Guelachvili +2
The feasibility of sub-Doppler broadband multi-heterodyne spectroscopy with two laser frequency combs is demonstrated with two-photon excitation spectra of the 5S-5D transitions of…
A phase-stable dual-comb interferometer
Zaijun Chen, Ming Yan, Theodor W. Hänsch +1
Improvements to dual-comb interferometers will benefit precision spectroscopy and sensing, distance metrology, tomography, telecommunications etc. A specific requirement of such in…
Dual-Comb Coherent Raman Spectroscopy with Lasers of 1-GHz Pulse Repetition Frequency
Kathrin J. Mohler, Bernhard J. Bohn, Ming Yan +2
We extend the technique of multiplex coherent Raman spectroscopy with two femtosecond mode-locked lasers to oscillators of a pulse repetition frequency of 1 GHz. We demonstrate spe…
Silicon-chip-based mid-infrared dual-comb spectroscopy
Mengjie Yu, Yoshitomo Okawachi, Austin G. Griffith +3
On-chip spectroscopy that could realize real-time fingerprinting with label-free and high-throughput detection of trace molecules is one of the 'holy grails" of sensing. Such minia…
Mid-infrared dual-comb spectroscopy with electro-optic modulators
Ming Yan, Pei-Ling Luo, Kana Iwakuni +3
We demonstrate dual-comb spectroscopy based on difference frequency generation of frequency-agile near-infrared frequency combs, produced with the help of electro-optic modulators.…
Frequency-agile dual-comb spectroscopy
Guy Millot, Stéphane Pitois, Ming Yan +4
We propose a new approach to near-infrared molecular spectroscopy, harnessing advanced concepts of optical telecommunications and supercontinuum photonics. We generate, without mod…
An octave spanning mid-infrared frequency comb generated in a silicon nanophotonic wire waveguide
Bart Kuyken, Takuro Ideguchi, Simon Holzner +9
We demonstrate an octave-spanning frequency comb with a spectrum covering wavelengths from 1,540 nm up to 3,200 nm. The supercontinuum is generated by pumping a 1-cm long dispersio…
Few-cycle, Broadband, Mid-infrared Optical Parametric Oscillator Pumped by a 20-fs Ti:sapphire Laser
Suddapalli Chaitanya Kumar, Adolfo Esteban-Martin, Takuro Ideguchi +5
We report a few-cycle, broadband, singly-resonant optical parametric oscillator (OPO) for the mid-infrared based on MgO-doped periodically-poled LiNbO3 (MgO:PPLN), synchronously pu…
Fourier transform spectroscopy around 3 microns with a broad difference frequency comb
Samuel A. Meek, Antonin Poisson, Guy Guelachvili +2
We characterize a new mid-infrared frequency comb generator based on difference frequency generation around 3.2 microns. High power per comb mode (>10-7 W/mode) is obtained over a…
Coherent Raman spectro-imaging with laser frequency combs
Takuro Ideguchi, Simon Holzner, Birgitta Bernhardt +3
Optical spectroscopy and imaging of microscopic samples have opened up a wide range of applications throughout the physical, chemical, and biological sciences. High chemical specif…
Adaptive real-time dual-comb spectroscopy
Takuro Ideguchi, Antonin Poisson, Guy Guelachvili +2
With the advent of laser frequency combs, coherent light sources that offer equally-spaced sharp lines over a broad spectral bandwidth have become available. One decade after revol…
Supercontinua for high resolution absorption multiplex infrared spectroscopy
Julien Mandon, Evgeni Sorokin, Irina T. Sorokina +2
Supercontinua generated in highly non-linear fibers by ultrashort-pulse lasers can be used for high resolution Fourier transform absorption spectroscopy. The practical advantages o…
Frequency modulation Fourier transform spectroscopy
Julien Mandon, Guy Guelachvili, Nathalie Picqué
A new method, FM-FTS, combining Frequency Modulation heterodyne laser spectroscopy and Fourier Transform Spectroscopy is presented. It provides simultaneous sensitive measurement o…
Femtosecond laser Fourier transform absorption spectroscopy
Julien Mandon, Guy Guelachvili, Nathalie Picqué +2
A femtosecond mode-locked laser is used for the first time as a broadband infrared source for high resolution Fourier transform absorption spectroscopy. Demontration is made with a…
High-sensitivity time-resolved intracavity laser Fourier transform spectroscopy with vertical cavity surface emitting multiple quantum well lasers
Nathalie Picqué, Guy Guelachvili, Alexander A. Kachanov
Spectra comprised of hundreds of time-components for absorption path lengths up to 130 km have been recorded around 1050 nm by combining two recent techniques, intracavity laser sp…
Time-resolved Fourier transform intracavity spectroscopy with a Cr2+:ZnSe laser
Nathalie Picqué, Fatou Gueye, Guy Guelachvili +2
Intracavity laser absorption spectroscopy (ICLAS) with an evacuated Cr2+: ZnSe laser is performed with a high-resolution time-resolved Fourier transform interferometer with a minim…