supercontinuum generation

Supercontinuum generation is a process where laser light is converted to light with a very broad spectral bandwidth (i.e., low temporal coherence ), i.e., a super-wide continuous optical spectrum . We unlock the potential of millions of people worldwide. The first category corresponds to long pump pulses, whereas the second category is obtained with short pump pulses. The fiber was drawn from thermally matched oxide soft glasses with a hexagonal lattice 35 m in diameter, 2.5 m solid core and pitch of /d = 0.9. Supercontinuum light with a spectrum more than two octaves broad (370-1545 nm at the 20-dB level) was generated in a standard telecommunications fiber by femtosecond pulses from an unamplified Ti:sapphire laser. The temporal and spectral evolution of the pulse is shown in Fig. Millimeter-scale chip-based supercontinuum generation. We demonstrate supercontinuum generation over an octave spaning from 1055 to 2155 nm on the highly nonlinear aluminum gallium arsenide (AlGaAs)-on-insulator platform. We experimentally demonstrate supercontinuum (SC) generation in a germanium-on-silicon waveguide. The supercontinuum generation can be broadly divided in two categories, depending on the duration of the pump pulses. Modeling the SCG is discussed . The corresponding conversion efficiency was 46.3%. Supercontinuum (SC) generation is the phenomenon in which a nearly continuous spectrally broadened output is produced through nonlinear effects on high peak power picosecond and subpicosecond pulses. 12, Issue. Introduction. ), whereas the spatial coherence usually remains high. =0.18), a supercontinuum can be generated from a 50fs input sech pulse with 10kW peak power in OptiSystem software. We report on a numerical study of supercontinuum generation in a single-mode optical fiber. Supercontinuum generation is a combination of nonlinear optical effects that spectrally broaden an initially nearly monochromatic laser beam. It also introduces new results of design and fabrication of these structures with engineered dispersion, development of new diagnostic tools, as . The SC light had a 5 dB bandwidth of 1776 nm in the range from 1028 to 2804 nm and an output power of 201 mW. This waveguide exhibits propagation loss between 1.2 dB/cm and 1.35 dB/cm in the 3.6 m-4.5 m spectral region for both transverse electric (TE) and transverse magnetic (TM) polarizations. When the two pulses are temporally overlapped in the fiber a broad supercontinuum appears. The pronounced effect the waveguide width has on the nonlinear dynamics governing the supercontinua is systematically analyzed and the coherence of the spectra verified with numerical simulations. Lett. Supercontinuum generation using ultra-miniaturized devices is of great interest for on-chip imaging, on-chip measurement, and for future integrated photonic devices . About us. A mid-infrared supercontinuum is generated when the pump wavelength is 2450 nm. It was first reported in March of 1970 by Alfano and Shapiro, although the term itself was never published until the mid-1980s and only later received widespread acceptance [ 1, 2 ]. As discussed in Chapter 1, nonlinear fibre optics is a very mature field of research, and nonlinear propagation effects have been studied under a wide range of conditions. This phenomenon occurs when narrowband incident pulses from pump beam results in spectral broadening due to nonlinear effects. CiteSeerX - Scientific documents that cite the following paper: Soliton fission and supercontinuum generation in silicon waveguides," Documents; Authors; Tables; Documents: Advanced Search Include Citations Authors: Advanced Search Include Citations Tables: Soliton fission and supercontinuum generation in silicon waveguides," (2007) by L Yin, Q Lin, G P Agrawal Venue: Opt. Numerical simulations predict that the supercontinuum actually extends to 7.8 m. The generated supercontinuum possesses a spectral coherence (|g 12 |) exceeding 0.94 on average across the measured wavelength range. 11, p. 113001 . The supercontinuum (SC) generation is the result of joint contribution of strong field ionization and quantum coherence among various ionic states, which is intrinsically different from prior. The higher the pump intensity, the broader the supercontinuum. The edge was found to be 615 nm. In this letter, we present a scheme where the input energy requirements for integrated . Supercontinuum generation example. Supercontinuum generation from a photonic crystal optical fiber (seen as a glowing thread on the left) for gradually increasing intensity of a pump laser. A supercontinuum is generated by the extreme nonlinear interactions between a pump laser and the nonlinear medium, it is known as a white laser because of its broad spectral bandwidth, high coherence and high intensity. Our assessments, publications and research spread knowledge, spark enquiry and aid understanding around the world. The waveguide is pumped at telecom wavelengths (1555 nm) with 3.6 pJ . Show author details. Until now, supercontinuum generation in bulk media . At present, it has been widely used in various fields of modern scientific disciplines, such as optical frequency comb [ 6 ], precision frequency metrology [ 7 ], pulse compression [ 8 ], and optical coherence tomography [ 9 ]. Results from numerical simulations are used to discuss the temporal and spectral characteristics of the supercontinuum, and to interpret the physics of the . The experimentally generated supercontinuum extended from 2.4 to 5.5 m, only limited by the long wavelength detection limit of our spectrum analyzer. PDF - Supercontinuum generation from nanojoule femtosecond lasers is well known in photonic-crystal fibers, channel waveguides, and micro-resonators, in which strong confinement shapes their dispersion and provides sufficient intensity for self-phase modulation, four-wave mixing, and Raman scattering to cause substantial spectral broadening. Jing Hou. In the nanosecond experiments, a 300-nm broadband visible continuum was generated in a 1.8-m length of fiber pumped at 532 nm by 0.8-ns pulses from a frequency-doubled passively Q-switched Nd:YAG microchip laser. This fact is equivalent to extending the wavelength range from 1800 to 5400 nm. January . This limit is much higher than in case of commonly used shappire or CaF 2 . The pulse energy was 3.9 nJ (average power, 300 mW). Linyong Yang Affiliation: College of . The SuperK series is an industry-leading range of turn-key supercontinuum white light lasers used by the most innovative companies within bio-imaging, semiconductor inspection, sorting, device characterization, and scientific instrumentation. The article collection in this feature issue presents the most recent experimental and numerical studies of supercontinuum generation in bulk nonlinear media, photonic crystal fibers, and waveguides. Schematic of a fiber-coupled SD OCT system with a supercontinuum source generated by the Si3N4 waveguide. On the right, the spectrum of the supercontinuum is shown after the output beam passed through a prism. White-light generation: This Minireview summarizes current developments in the field of supercontinuum generation with amorphous molecular materials.The compounds in the focus of this work share a common general formula, [(RT) 4 E 6] (T=C, Si, Ge, Sn; E=CH 2, S; Se, Te), in which a molecular organic or inorganic adamantane-shaped cage is surrounded by four organic ligands R. Journal of Optics, Vol. Overview Fingerprint Abstract We report on octave-spanning supercontinuum generation under pumping with 1360 nm, 120 fs pulses, in an all-solid, all-normal dispersion photonic crystal fiber. Supercontinuum (SC) generation in nonlinear media originates from the interaction of ultrashort pulses and the dispersion and nonlinear effects, such as self-phase modulation (SPM), four wave mixing, stimulated Raman scattering (SRS), soliton self-frequency shift, etc. Chapter. 1. Self-phase modulation, intra-pulse Raman scattering and self-steepening effects are considered in the nonlinear fiber model implemented in OptiSystem. Supercontinuum generation is when intense laser light of one color travels within a material, like glass, and broadens into a spectrum of colors. 4. This figure clearly shows the ultra-broadband supercontinuum generation with the total bandwidth of 3600 nm in a way which covers near infrared to mid infrared regions of the spectrum. 2019 ), have been a subject of intense research over the past decade. By tuning the temporal delay between the two . These types of fibers highly absorb telecommunication wavelengths and hence cannot be used to transmit information over the corresponding wavelengths. The effect of engineering the dispersion of AlGaAs-on-insulator (AlGaAs-OI) waveguides on supercontinuum generation is investigated at telecom wavelengths. Results from numerical simulations are used to discuss the temporal and spectral characteristics of the supercontinuum, and to interpret the physics of the . Fully considering the economic change by . We demonstrate a new approach to supercontinuum generation and carrier-envelope-offset detection in dispersion-engineered nanophotonic waveguides based on saturated second-harmonic generation of femtosecond pulses. PDF | On Sep 26, 2022, Linyong Yang and others published Record-power and Efficient Mid-infrared Supercontinuum Generation in Germania Fiber with High Stability | Find, read and cite all the . . Introduction We present experimental and numerical investigations of high-energy mid-infrared filamentation with multi-octave-spanning supercontinuum generation (SCG), pumped by a 2.4 m, 250 fs Cr:ZnSe chirped-pulse laser amplifier. Different pumping conditions for supercontinuum generation (SCG) are described, namely those using femtosecond pulses, picosecond pulses, and a continuous wave (CW). This means that the temporal coherence is very low (but with important restrictions - see below! A 10 MHz oscillator delivering 300 femtosecond pulses at 1028 nm is frequency doubled and both the fundamental and second harmonic are coupled into a micro structured fiber. light sources exhibiting an ultra-broad band of frequencies and good quality beam (Liu et al. [ 4] We have studied the dispersion engineered . Here is an example of supercontinuum generation in a fiber. We study the generation of supercontinua in air-silica microstructured fibers by both nanosecond and femtosecond pulse excitation. The general features observed in the case of long duration pulses can also be extended to the continuous wave . The supercontinuum-based frequency comb generation is investigated. Supercontinuum generation in dispersion engineered AlGaAs-on-insulator waveguides May, S. , Clerici, M. and Sorel, M. (2020) Supercontinuum generation in dispersion engineered AlGaAs-on-insulator waveguides. A topical review of numerical and experimental studies of supercontinuum generation in photonic crystal fiber is presented over the full range of experimentally reported parameters, from the femtosecond to the continuous-wave regime. The extreme spectral broadening of pulses with an initially narrow spectrum propagating in a nonlinear medium is known as supercontinuum generation (SCG). Market Analysis and Insights: Global Supercontinuum Generation Kit Market Due to the COVID-19 pandemic, the global Supercontinuum Generation Kit market size is estimated to be worth US$ million in 2022 and is forecast to a readjusted size of US$ million by 2028 with a CAGR of % during the review period. A topical review of numerical and experimental studies of supercontinuum generation in photonic crystal fiber is presented over the full range of experimentally reported parameters, from the femtosecond to the continuous-wave regime. The kit components are shipped unassembled. The generation of a two-octave supercontinuum from the visible to mid-infrared (700-2800 nm) in a non-silica graded-index multimode fiber is reported. Due to this modular nature, the supercontinuum kits may be easily customized to a particular application by replacing components. Optical supercontinuum generation (SCG) technology is a practical method to realize ultrabroadband spectral laser. Linyong Yang [Opens in a new window], Yukun Yang, Bin Zhang, Xiran Zhu [Opens in a new window], Desheng Zhao [Opens in a new window], Shuailin Liu and. A 1.2-octave-spanning supercontinuum generation is demonstrated in a 3-mm-long ultra-silicon-rich-nitride waveguide using 17pJ, 500fs pulses. Supercontinuum (SC) lasers, i.e. Chalcogenide-based photonic crystal fibers (PCFs), due to their nonlinear properties, are capable of producing supercontinuum spectra, which can be used in the wavelength division multiplexing (WDM). Travers, J C 2010. [ 1 - 3] Maximum coherence is achieved when spectral broadening is dominated by self-phase modulation based on the intensity-dependent Kerr index. This is enabled by the generation of two dispersive waves in a 3-mm-long dispersion-engineered nano-waveguide. Supercontinuum spectrum covering a wavelength range from about 500 nm to 1 m was obtained. Published online by Cambridge University Press: 26 September 2022. Flat supercontinuum (SC) generation was obtained in a 1.5 m long all-solid fluorotellurite fiber pumped by a 1560 nm femtosecond fiber laser. Supercontinuum generating sources, which incorporate a non-linear medium that can generate a wideband intensity spectrum under high-power excitation, are ideal for many applications of photonics such as spectroscopy and imaging. Our assessments, publications and research spread knowledge, spark enquiry and aid understanding around the world. The optical fiber based supercontinuum source has recently become a significant scientific and commercial success, with applications ranging from frequency comb production to advanced medical. import numpy as np import matplotlib.pyplot as plt import pynlo FWHM = 0.050 # pulse duration (ps) pulseWL = 1550 # pulse central wavelength (nm) EPP = 50e-12 # Energy per pulse (J) GDD = 0.0 # Group delay dispersion (ps^2) TOD = 0.0 # Third order . We show that the modulation instability is responsible for the generation of ultrabroadband. Request PDF | On Jan 1, 2019, Govind P. Agrawal published Supercontinuum generation | Find, read and cite all the research you need on ResearchGate. Record-power and Efficient Mid-infrared Supercontinuum Generation in Germania Fiber with High Stability. This can be achieved, for example, by sending a short. Download PDF Abstract: Fully integrated supercontinuum sources on-chip are critical to enabling applications such as portable and mechanically-stable medical imaging devices, chemical sensing and LiDAR. For an example, please see the . We investigate supercontinuum generation with a femtosecond dual-pumping scheme. However, the low-efficiency of current supercontinuum generation schemes prevent full on-chip integration. Tapered fibers can be utilized efficiently for a variety of photonics applications such as, supercontinuum generation [164], harmonic generation [165], power amplification [166], optical coupling. Supercontinuum generation. The supercontinuum generation kits consist of preselected, proven parts that allow the user to quickly build a setup and create a supercontinuum spectrum. This . The SC is spatially coherent and the spectral bandwidth can span several hundreds of nanometres. The fiber design is based on a nanostructured. To the best of our knowledge, this is the first report of flat SC generation in ultra-high NA . The fiber had been tapered to a diameter of :2mum over a 90-mm length. In this Letter, we demonstrate that the extinction of the SC spectrum always correlates with an occurrence of conical third . At this wavelength, the dominant mode excited . The effect lets scientists produce light at colors tailored to particular applications in sectors like bioimaging, optical communications and fundamental studies of materials. The SCG is demonstrated in both anomalous and normal dispersion regimes with YAG and polycrystalline ZnSe, respectively. Unlike conventional approaches which use either a single micro-structured photonic crystal fiber (PCF) or an individual fiber or PCF taper . Science Advances, doi:10.1126 . In contrast with traditional approaches based on self-phase modulation, this technique simultaneously broadens both harmonics by generating rapid amplitude modulations of the field . Supercontinuum generation (SCG) is a nonlinear optical process where injecting intense, ultrashort pulses in transparent optical materials generates light with ultrawide spectral bandwidth. Using aluminum-nitride photonic-chip waveguides, we generate optical frequency comb supercontinuum spanning 500~nm to 4000~nm, and show that the spectrum can be widely tailored by changing the geometry of the waveguide. The generation of a supercontinuum is a highly complex process resulting from the propagation of intense light pulses in a nonlinear medium such as an optical fibre or waveguide. Supercontinuum Generation in Suspended Core As 2 S 3 Tapered Fiber Abstract: We report the first supercontinuum source using a tapered microstructured As 2 S 3 fiber by pumping at a wavelength of 1.938 m. It makes diamond not favourable as a material for supercontinuum generation for spectroscopic purposes in the visible light. The all-fiber source leads to a supercontinuum spanning from 1.50 m to 2.65 m with an average power of 14.5 mW. [1,2,3].It is a process in which narrow band pump pulses with high peak power are broadened continuously in the spectral domain. About us. We have experimentally investigated supercontinuum (SC) generation and the evolution of optical damage in sapphire and YAG crystals with 180 fs, 1035 nm pulses from an amplified Yb:KGW laser with variable repetition rates, both in tight and loose focusing conditions. Add To . A near-infrared supercontinuum is generated when the pump wavelength is 1300 nm. The term supercontinuum refers to the generation of new optical frequencies covering a wide continuous spectral range through nonlinear light-matter interaction. In [2] we demonstrated supercontinuum generation in individual fibers of a commercial Schott imaging fiber taper. Supercontinuum Generation in Optical Fibers - April 2010. This has applications in, e.g., component characterization, spectroscopy, optical . Supercontinuum generation is an important nonlinear process, which finds applications in a number of fields including metrology, optical coherence tomography, spectroscopy and pulse compression 15.. Blue extension of optical fibre supercontinuum generation. We unlock the potential of millions of people worldwide. Deep-ultraviolet to mid-infrared supercontinuum generated in solid-core ZBLAN photonic crystal fibre A low-loss ZBLAN micro-structured fibre is used to generate a supercontinuum spanning from the. 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