Broadband stimulated Raman scattering spectroscopy by a photonic time stretcher

Saltarelli, Francesco; Kumar, Vikas; Viola, Daniele; Crisafi, Francesco; Preda, Fabrizio; Cerullo, Giulio; Polli, Dario

doi:10.1364/oe.24.021264

Cited by 37 publications

(23 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With its unique capability to measure single-shot spectra at high repetition rates, PTS has found application in the detection of rare events, such as optical rogue waves, [229] and in the study of fast dynamical processes, such as the onset of the mode-locking regime from random intracavity power fluctuations. [230] Recently, Saltarelli et al [231] and Dobner et al [232] applied the PTS approach to the detection of broadband SRS spectra. The concept of PTS-SRS is quite simple: a narrowband pump and a broadband Stokes pulse are combined and sent to the sample, the pump is modulated at high frequency and the Stokes spectra after the sample are detected on a single-shot basis by the PTS technique.…”

Section: Photonic Time Stretch Srsmentioning

confidence: 99%

Broadband Coherent Raman Scattering Microscopy

Polli

Kumar

Valensise

et al. 2018

Laser & Photonics Reviews

Self Cite

View full text Add to dashboard Cite

Spontaneous Raman (SR) microscopy allows label-free chemically specific imaging based on the vibrational response of molecules; however, due to the low Raman scattering cross section, it is intrinsically slow. Coherent Raman scattering (CRS) techniques, by coherently exciting all the vibrational oscillators in the focal volume, increase signal levels by several orders of magnitude. In its single-frequency version, CRS microscopy has reached very high imaging speeds, up to the video rate; however, it provides an information which is not sufficient to distinguish spectrally overlapped chemical species within complex heterogeneous systems, such as cells and tissues. Broadband CRS combines the acquisition speed of CRS with the information content of SR, but it is technically very demanding. This paper reviews the current state of the art in broadband CRS microscopy, both in the coherent anti-Stokes Raman scattering (CARS) and the stimulated Raman scattering (SRS) versions. Different technical solutions for broadband CARS and SRS, working both in the frequency and in the time domains, are compared and their merits and drawbacks assessed.2

show abstract

Section: Photonic Time Stretch Srsmentioning

confidence: 99%

Broadband Coherent Raman Scattering Microscopy

Polli

Kumar

Valensise

et al. 2018

Laser & Photonics Reviews

Self Cite

View full text Add to dashboard Cite

show abstract

“…We have developed a simple and low-cost multimodal NLO laser-scanning microscope, following the design in Alternatively, it can also be utilized as a raster scanning stage for acquiring images of the sample without scanning the beams. This method is particularly important for microscopic techniques that are sensitive either to polarization, such as balanced-detection Raman induced Kerr-effect microscopy [34], or to beam pointing, such as broadband Fourier-transform SRS using a birefringent interferometer [33] or broadband SRS spectroscopy using a photonic time stretcher [35]. After the sample, the generated forward CARS, SRS and TPEF signals are collected by a second identical microscope objective.…”

Section: Methodsmentioning

confidence: 99%

Multimodal nonlinear microscope based on a compact fiber-format laser source

Crisafi

Kumar

Perri

et al. 2018

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

Self Cite

View full text Add to dashboard Cite

We present a multimodal non-linear optical (NLO) laser-scanning microscope, based on a compact fiber-format excitation laser and integrating coherent anti-Stokes Raman scattering (CARS), stimulated Raman scattering (SRS) and two-photon-excitation fluorescence (TPEF) on a single platform. We demonstrate its capabilities in simultaneously acquiring CARS and SRS images of a blend of 6-μm poly(methyl methacrylate) beads and 3-μm polystyrene beads. We then apply it to visualize cell walls and chloroplast of an unprocessed fresh leaf of Elodea aquatic plant via SRS and TPEF modalities, respectively. The presented NLO microscope, developed in house using off-the-shelf components, offers full accessibility to the optical path and ensures its easy re-configurability and flexibility.

show abstract

“…Temporal imaging systems (TIS), since the last two decades, have gained variant applications ranging from optical communications [5], optical data acquisition and compression [6,13] to ultrafast microscopy [12], quantum information processing [10,11], spectroscopy [14,15], and etc. [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Improved depth resolution and depth-of-field in temporal integral imaging systems through non-uniform and curved time-lens array

2020

View full text Add to dashboard Cite

Observing and studying the evolution of rare non-repetitive natural phenomena such as optical rogue waves or dynamic chemical processes in living cells is a crucial necessity for developing science and technologies relating to them. One indispensable technique for investigating these fast evolutions is temporal imaging systems. However, just as conventional spatial imaging systems are incapable of capturing depth information of a three-dimensional scene, typical temporal imaging systems also lack this ability to retrieve depth information-different dispersions in a complex pulse. Therefore, enabling temporal imaging systems to provide these information with great detail would add a new facet to the analysis of ultrafast pulses. In this paper, after discussing how spatial three-dimensional integral imaging could be generalized to the time domain, two distinct methods have been proposed in order to compensate for its shortcomings such as relatively low depth resolution and limited depth-of-field. The first method utilizes a curved time-lens array instead of a flat one, which leads to an improved viewing zone and depth resolution, simultaneously. The second one which widens the depth-of-field is based on the non-uniformity of focal lengths of time-lenses in the time-lens array. It has been shown that compared with conventional setup for temporal integral imaging, depth resolution, i.e. dispersion resolvability, and depth-of-field, i.e. the range of resolvable dispersions, have been improved by a factor of 2.5 and 1. 87, respectively. arXiv:1911.12397v1 [physics.optics] 27 Nov 2019 II. SPATIAL AND TEMPORAL INTEGRAL IMAGING: FORWARD AND RECONSTRUCTION STEPSInI technique is composed of two steps. First, the forward imaging step in which EIs are obtained and second, the reconstruction step that uses the EIs captured by the first step to reproduce or reconstruct the full 3D scene. In this section, we will briefly discuss these steps of spatial InI systems and based on that, we will discuss the forward and

show abstract

Broadband stimulated Raman scattering spectroscopy by a photonic time stretcher

Cited by 37 publications

References 48 publications

Broadband Coherent Raman Scattering Microscopy

Broadband Coherent Raman Scattering Microscopy

Multimodal nonlinear microscope based on a compact fiber-format laser source

Improved depth resolution and depth-of-field in temporal integral imaging systems through non-uniform and curved time-lens array

Contact Info

Product

Resources

About