Broadband light sources are important for applications such as nonlinear microscopy, optical coherence tomography, frequency metrology, and ultra short pulse compression. A key area of my research since 2000 has focused on studying nonlinear propagation and supercontinuum generation in highly nonlinear and photonic crystal fibers pcf. We theoretically investigate the nonlinear propagation of femtosecond pulses in liquidcore photonic crystal fibers filled with cs2. Wavelength conversion and supercontinuum generation in. Although supercontinuum generation can be observed in a drop of water given enough pumping power, photonic crystal fibers are ideal media for supercontinuum generation as the dispersion can be designed to facilitate continuum generation in. Satellites chock full of optical components beam our cell phone signals to every corner of the globe. Dudley in chapter 3 of the book supercontinuum generation in. If nothing happens, download github desktop and try again. The scg800 supercontinuum fiber module is a polarizationmaintaining supercontinuum device for use with 800nm range femtosecond lasers.
Supercontinuum generation in chalcogenide layered spiral. Infrared supercontinuum generation in softglass fibers. Despite the strong selffocusing and the formation of multiple hotspots along the vortex ring, the singularity is preserved in both the near. This work has involved experiments carried out by my own group in france, as well as analysis of results from a number of international groups. Supercontinuum generation in pcfs has subsequently been widely applied in interdisciplinary. Install the collimating objective 20x, after the scg800 and adjust it to collimate the output beam. Demonstrations of supercontinuum in microstructured tellurite fibers, allsolid leadsilicate sf57 fibers and in bismuth fibers and tapers are then reported to show what has been achieved experimentally using a range of materials and fiber geometries. Supercontinuum generation in optical fibers updated source code. Allnormal dispersion photonic crystal fiber for coherent. Optical fiber technology fiber supercontinuum sources. Supercontinuum generation in optical fibers request pdf. Zheltikov physics department, international laser center, m.
Supercontinuum generation by photonic crystal fibers. While optical fibers have been the workhorse of supercontinuum generation since its. Blue extension of optical fibre supercontinuum generation. A bandwidth of 268 nm at 15 db level with an average spectral density of 2. The newport supercontinuum kit is a complete solution from newport and spectraphysics designed specifically for the generation of supercontinuum with a femtosecond ti. Ludvigsen fiberoptics group, department of electrical and communications engineering, helsinki university of technology.
The supercontinuum generation in the designed fiber with selected pump wavelengths and pulse durations were simulated through numerically solving the. Optical system photonic crystal fiber supercontinuum generation photonic crystal fiber pcf provides a unique platform for realizing the desired dispersion, birefringence, confinement, and mode multiplicity characteristics for myriad of applications. Introduction to nonlinear effects involving in the process of supercontinuum generation. When femtosecond pulses are used, the spectral broadening can be dominantly caused by selfphase modulation. Broadband optical supercontinuum generation in a long.
Photonic band cap guidance in optical fibers, science 282 5393. Here, we have chosen a highly nonlinear glass for its composition, the arsenic trisulfide, and we have determined its dispersion and nonlinear characteristics. We use a dealiased pseudospectral method with integration performed by an eighthorder rungekutta integration scheme using adaptive stepsize control 1, 2 which is more precise than the widelyused splitstep method. Ieee journal of selected topics in quantum electronics. Limits of coherent supercontinuum generation in normal. Supercontinuum generation in nonlinear optical fibers. A fourthorder rungekutta in the interaction picture method for simulating supercontinuum generation in optical fibers, j. Supercontinuum generation in optical fibers edited by j. Osa supercontinuum generation in liquidfilled photonic. Rediff mypage refind renren sina weibo sitejot skype slashdot sms stocktwits svejo symbaloo bookmarks threema. Supercontinuum generation in photonics crystal fibers v2.
Campbell and jeff thomas supercontinuum generation in photonic crystal fibers. It can be achieved in certain optical fibers, for example. Supercontinuum generation in silica photonic crystal fiber at. Recently, the generation of coherent, octavespanning, and recompressible supercontinuum sc light has been demonstrated in optical fibers with allnormal group velocity dispersion gvd behavior by femtosecond pumping. Onchip twooctave supercontinuum generation by enhancing selfsteepening of optical pulses. In optics, a supercontinuum is formed when a collection of nonlinear processes act together. While optical fibers have been the workhorse of supercontinuum generation since its inception, integrated waveguide based sources of supercontinuum have become an active area of research in the twenty first century. We demonstrate supercontinuum sc generation in tapered tellurite microstructure optical fiber mof. Supercontinuum generation in microstructured fibers and. We emphasize the advantage of liquid infiltration in enhancing the fiber nonlinearity. Sapphire laser at 800 nm wavelength e hollow core pcf. Rp photonics encyclopedia supercontinuum generation. Dataset for wavelength conversion and supercontinuum.
The physical processes behind supercontinuum generation in fibers can be very different, depending particularly on the chromatic dispersion and length of the fiber or other nonlinear medium, the pulse duration, the initial peak power and the pump wavelength. We get the optical bandwidth of the sc from 950 to 2400nm at the. In recent years, midinfrared mir supercontinuum sc light sources have attracted considerable attention for potential applications, including optical ir coherence tomography oct, metrology, and spectroscopy. We demonstrate that the continuum generation process is initiated by the filamentation of the vortex, resulting in a spatially divergent continuum. This chapter presents a state of the art of infrared supercontinuum generation in heavy oxide tellurite optical fibers from the experimental results published by the international community. Supercontinuum is one of the most spectacular outcome of nonlinear optics. Highspectralflatness midinfrared supercontinuum generated. Chalcogenide fiber is promising for mir sc generation because of its wide transmission window and high nonlinearity. On the right, the spectrum of the supercontinuum is shown after the output beam passed through a prism. Supercontinuum generation in nonsilica fibers eprints soton. How tapering fibers offers the best of both worlds for visible supercontinuum generation.
Supercontinuum generation in nanostructured core gradient. Supercontinuum sc generation has become an active research topic over the last few years12 3 456789 because of its unique application in diverse fields, such as in optical coherence tomography. Since its introduction nearly 2 decades ago, optical fiber based supercontinuum has become the light source of first choice in research as well as for industrial applications in optical coherent tomography fujimoto 2003, frequency combs generation for high precision metrology jones et al. Supercontinuum generation by photonic crystal fibers roland michaely. Supercontinuum generation using microstructured optical fibers. The length of tapered region is 3cm and the core diameter is from 7. Sapphire laser such as the tsunami or mai tai ultrafast oscillators.
Supercontinuum sc generation describes the phenomenon that the output spectrum becomes much wider than the input spectrum when an ultrashort optical pulse passes through a nonlinear medium, such as bulk fused silica, photonic crystal fiber and so on. Experiments and simulations carried out at 1550 nm indicate that the modal composition of the input beam can substantially alter the soliton fission process. By focusing hard enough a powerful laser beam in front of a sapphire plate, self. Extended blue supercontinuum generation in cascaded holey. In this letter, a new method for achieving ultraflat supercontinuum generation is proposed. Supercontinuum generation with fixedwavelength lasers. Users may download and print one copy of any publication from the public. Oct 16, 2017 this paper describes the stateoftheart in wavelength conversion and supercontinuum generation using glassclad silicon core optical fibers. Perhaps more interesting is the soliton dynamics involved in the supercontinuum generation, and our ability to tailor the optical. The optical fiber based supercontinuum source has recently become a significant scientific and commercial success. As tmdoped fiber could be used not only as the gain medium for 2. Lomonosov moscow state university, 119899 moscow, russia.
We theoretically propose a novel liquid filled suspended core photonic crystal fiber as a new class of microstructure optical fiber for ultrabroad supercontinuum generation. Visible supercontinuum generation in photonic crystal. The higher the pump intensity, the broader the supercontinuum. Supercontinuum generation in photonics crystal fibers. The difference of sc generation is investigated by fabricating the tellurite mof and tapered tellurite mof at the same pumping condition. Participants used skype, free software for internet telephone, and bridget. What are the requirements for hnlf highly nonlinear fiber in xpm and in supercontinuum generation. Optical microscope picture of a singlemode fiber with zero. In the normal dispersion regime, soliton dynamics are suppressed and the sc generation process is mainly due to selfphase modulation and optical wave breaking. Floresrosas, initial development of supercontinuum. Femtosecond fiber lasers buccaneer del mar photonics. Supercontinuum generation from a photonic crystal optical fiber seen as a glowing thread on the left for gradually increasing intensity of a pump laser. Osa versatile supercontinuum generation in parabolic.
Versatile supercontinuum generation in parabolic multimode. Supercontinuum generation in microstructured fibers and novel. Sapphire plate for white light continuum generation. We demonstrate that the pumps spatial input profile can provide additional degrees of freedom in tailoring at will the nonlinear dynamics and the ensuing spectral content of supercontinuum generation in highly multimoded optical fibers. Price,2 and thomas feurer1 1institute of applied physics, university of bern, sidlerstrasse 5, 3012 bern, switzerland 2optoelectronics research centre, university of southampton, southampton, so17 1bj, uk corresponding author. In many cases, optical fibers are used for supercontinuum generation.
The education and training in optics and photonics conference. As a first part, a bibliographic table gathers the literature on which this work is based. An experimental education package on optical fibre raman. Price,2 and thomas feurer1 1institute of applied physics, university of bern, sidlerstrasse 5, 3012 bern, switzerland. Enhanced bandwidth of supercontinuum generated in microstructured fibers g.
Difference between ring laser gyroscope and fiber optic gyroscope. Cambridge core electronic, optoelectronic devices, and nanotechnology supercontinuum generation in optical fibers edited by j. Ultraflat supercontinuum generation in cascaded photonic. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Resonanceenhanced multioctave supercontinuum generation. Dudley in chapter 3 of the book supercontinuum generation in optical fibers edited by j.
Multiphoton microscopy ultrafast spectroscopy semiconductor device characterization supercontinuum generation optical coherence tomography. This page contains the original and in the future some updated matlab source code for simulating pulse propagation and supercontinuum generation in optical fiber as described by j. A picosecond fiber laser was used as the pump source, in a cascaded photonic crystal fiber, ultraflat supercontinuum generation spectrum at 3 db level from 1070 up to 1630 nm is obtained, to our knowledge, the 3 db bandwidth of 560 nm is the most flat supercontinuum generation obtained in photonic. Such semiconductor fibers have enjoyed considerable attention due to their intrinsically high thirdorder nonlinearities, which are markedly higher than in conventional infrared glasses. Supercontinuum generation with photonic crystal fibers and. Wavelength conversion and supercontinuum generation in silicon optical fibers. Our new approach uses the effect of stimulated stokes raman scattering in a low loss fiber. Supercontinuum generation in tellurite optical fibers.
Supercontinuum generation in photonic crystal fibres with. And ico officials now meet face to face several times a year via skype, a technology that wasnt ever dreamed of when ico was founded in 1947. In addition, the compression causes additional nonlinear. The layered spiral microstructured optical fiber lsmof design allows higher nonlinearities than the most common microstructured optical fibers. Highspectralflatness midinfrared supercontinuum generated from a tmdoped fiber amplifier jihong geng, qing wang, and shibin jiang advalue photonics, 3708 e columbia street, suite 100, tucson, arizona 85714, usa.
Fibre bragg grating and long period grating sensors in. Onchip twooctave supercontinuum generation by enhancing. Osa supercontinuum generation with optical vortices. Superflat supercontinuum generation from a tmdoped fiber. Supercontinuum generation in integrated photonics platforms.
Modulation control and spectral shaping of optical fiber. Semiconductor device characterization, supercontinuum generation, optical. Supercontinuum generation is a complicated nonlinear process for strong spectral broadening of light. Supercontinuum generation in optical fibers updated. The dispersion characteristics of arsenic trisulfide as 2 s 3 chalcogenide glass were analyzed and a kind of as 2 s 3 microstructured optical fiber was designed to shift the zero dispersion wavelength from longer than 4. The accessories allow access to either particular spectral ranges or specific wavelengths within the ultrabroad superk spectrum. Investigation of telluriumbased chalcogenide doubleclad. The newport supercontinuum kit leverages the powerful combination of newports scg800 supercontinuum fiber module and high stability ultralign manual positioners. Photonic crystal fibers pcf are useful for supercontinuum generation due to the ability to engineer their dispersion and nonlinear properties 1. Supercontinuum generation in photonic crystal fiber. Efficient generation of cw supercontinuum in optical fiber. Churin d, nguyen t n, kieu k, norwood r a and peyghambarian n 20 midir supercontinuum generation in an integrated liquidcore optical fiber filled with cs2 opt. Fiber supercontinuum sources and their applications 30 october15 november 2012 123.
Mar 31, 2017 this chapter presents a state of the art of infrared supercontinuum generation in heavy oxide tellurite optical fibers from the experimental results published by the international community. Frequencytunable supercontinuum generation in photonic. Broadband flattened supercontinuum generation has been a target for researches for years due to its usefulness in many applications in different fields, such as optical coherence tomography oct in the biomedical field, optical sensing and optical communications systems to achieve high transmission capacity. Supercontinuum generation in optical fibers updated and additional source code. Frequencytunable supercontinuum generation in photoniccrystal. The supercontinuum generation results generally from the synergy between several fundamental nonlinear. Ico newsletter international commission for optics. Design of allnormal dispersion microstructured optical. Inaoe, 11042012 2 outline short historical background on supercontinuum. Thus, many biophotonics applications were greatly enhanced by the use of fiber supercontinuum generation in the past decade table 1. In many cases, results obtained in pcfs have inspired similar work using optical fiber tapers or highly nonlinear fibers hnlfs presenting comparable enhanced. Generally speaking, the output spectrum depends upon the peak power, pulse width, and the center wavelength of the pump.
Scientists generate supercontinuum light source using liquid core optical fibers and reveal a new type of soliton dynamics. Supercontinuum generation kit your source for fiber. Some special solutions, which are less widely used, are briefly mentioned in the following. These chipscale platforms promise to miniaturize supercontinuum. Supercontinuum generation is the formation of broad continuous spectra by propagation of high power pulses. However, the phenomenon occurring in optical fibers allows wide and costeffective access to the supercontinuum, resulting in a pulsed laserlike source spanning a broad bandwidth. Limits of coherent supercontinuum generation in normal dispersion fibers alexander m.
A plate is placed on the coiled fiber and a force is applied to compresses the coiled fiber and thereby increase the interactions between the compressed windings and induce modal mixing and birefringence in the fiber. Supercontinuum generation in single crystal sapphire fibers. Taylor imperial college of science, technology and medicine, london. Although supercontinuum generation can be observed in a drop of water given enough pumping power, photonic crystal fibers are ideal media for supercontinuum generation as the dispersion can be designed to facilitate continuum generation in a specific region. We employ an optical vortex beam for the generation of femtosecond supercontinuum in a solid state medium. The tapered tellurite microstructure optical fiber for the. Supercontinuum generation in microstructured fibers. A theoretical study on the supercontinuum generation in a. Frequently, one uses photonic crystal fibers, which can be made with tailored chromatic dispersion properties and often also exhibit increased nonlinearity due to strong mode confinement.
Coupling efficiency we define coupling efficiency as the ratio of the power measured after the collimating objective and the laser power measured before the focusing objective. If you want more information, send me an email, we can organize skype chat some time. This repository contains the matlab source code for simulating pulse propagation and supercontinuum generation in optical fiber as described by j. A new design of a gasfilled hollowcore optical fiber generates very broad supercontinuum light, spanning deep ultraviolet to near infrared. Us9176278b2 generating broadband spectral power in. Modulation control and spectral shaping of optical fiber supercontinuum generation in the picosecond regime. Lasers help produce music of a quality that was once the province of elaborate orchestras. We also define coupled power as the power of the supercontinuum measured after the collimating. Supercontinuum generation in scg800 photonic crystal fiber. A broadband spectral power generator in a multimode optical fiber utilizes a standard multimode fiber that is coiled. The accessories allow access to either particular spectral ranges or specific wavelengths within.
Since supercontinuum generation in single crystal sapphire fibers can radiate high power supercontinuum in the middleir regime, it will have a great impact on many applications, including sensing and broadband multispectrum free space communications. We propose a new and efficient approach to generation of a continuouswave supercontinuum in optical fiber pumped by an amplified spontaneous emission light. We report on a new and simple approach for continuous wave supercontinuum generation in optical fibers. The propagation of short and intense optical pulses through a nonlinear optical fiber is described by the. To further enhance the nonlinearity of the liquidinfiltrated fibers, we introduce a suspended liquid core photonic crystal fiber which. Supercontinuum generation in optical fibers book code. The optical fiber based supercontinuum source has recently become a significant scientific and commercial success, with applications ranging from frequency comb production to.
1050 1076 1025 1148 433 1026 713 907 528 20 515 781 1243 533 1477 429 424 384 699 156 1292 689 1009 1069 1236 335 243 106 607 79 57 711 212 661 1164 1076 1142 587 847 1331 713 833 812 461