Limits of coherent supercontinuum generation in normal. Supercontinuum generation in optical fibers updated. Supercontinuum generation with fixedwavelength lasers. Some special solutions, which are less widely used, are briefly mentioned in the following. Supercontinuum generation in optical fibers updated and additional source code. 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. These chipscale platforms promise to miniaturize supercontinuum. Frequencytunable supercontinuum generation in photoniccrystal. Allnormal dispersion photonic crystal fiber for coherent. Optical microscope picture of a singlemode fiber with zero.
Supercontinuum generation in microstructured fibers and. Lomonosov moscow state university, 119899 moscow, russia. Price,2 and thomas feurer1 1institute of applied physics, university of bern, sidlerstrasse 5, 3012 bern, switzerland. When femtosecond pulses are used, the spectral broadening can be dominantly caused by selfphase modulation. The accessories allow access to either particular spectral ranges or specific wavelengths within the ultrabroad superk spectrum. Supercontinuum generation in pcfs has subsequently been widely applied in interdisciplinary. 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. Inaoe, 11042012 2 outline short historical background on supercontinuum.
Onchip twooctave supercontinuum generation by enhancing selfsteepening of optical pulses. 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. Supercontinuum generation in photonics crystal fibers v2. Ieee journal of selected topics in quantum electronics. The supercontinuum generation results generally from the synergy between several fundamental nonlinear. The supercontinuum generation in the designed fiber with selected pump wavelengths and pulse durations were simulated through numerically solving the. Infrared supercontinuum generation in softglass fibers.
On the right, the spectrum of the supercontinuum is shown after the output beam passed through a prism. Supercontinuum generation from a photonic crystal optical fiber seen as a glowing thread on the left for gradually increasing intensity of a pump laser. We also define coupled power as the power of the supercontinuum measured after the collimating. 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. 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. Optical fiber technology fiber supercontinuum sources.
Supercontinuum generation in nanostructured core gradient. Superflat supercontinuum generation from a tmdoped fiber. The length of tapered region is 3cm and the core diameter is from 7. A theoretical study on the supercontinuum generation in a. While optical fibers have been the workhorse of supercontinuum generation since its. Photonic band cap guidance in optical fibers, science 282 5393.
Supercontinuum generation in nonsilica fibers eprints soton. 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. Participants used skype, free software for internet telephone, and bridget. Wavelength conversion and supercontinuum generation in. 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. Campbell and jeff thomas supercontinuum generation in photonic crystal fibers. To further enhance the nonlinearity of the liquidinfiltrated fibers, we introduce a suspended liquid core photonic crystal fiber which. The higher the pump intensity, the broader the supercontinuum. Supercontinuum generation by photonic crystal fibers. Supercontinuum generation in integrated photonics platforms. The propagation of short and intense optical pulses through a nonlinear optical fiber is described by the. Supercontinuum generation in silica photonic crystal fiber at. Enhanced bandwidth of supercontinuum generated in microstructured fibers g.
Perhaps more interesting is the soliton dynamics involved in the supercontinuum generation, and our ability to tailor the optical. Here, we have chosen a highly nonlinear glass for its composition, the arsenic trisulfide, and we have determined its dispersion and nonlinear characteristics. Sapphire laser at 800 nm wavelength e hollow core pcf. Satellites chock full of optical components beam our cell phone signals to every corner of the globe. It can be achieved in certain optical fibers, for example.
Supercontinuum generation using microstructured optical fibers. Efficient generation of cw supercontinuum in optical fiber. 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. A bandwidth of 268 nm at 15 db level with an average spectral density of 2. In many cases, results obtained in pcfs have inspired similar work using optical fiber tapers or highly nonlinear fibers hnlfs presenting comparable enhanced. The newport supercontinuum kit is a complete solution from newport and spectraphysics designed specifically for the generation of supercontinuum with a femtosecond ti. The tapered tellurite microstructure optical fiber for the. Sapphire plate for white light continuum generation. Osa supercontinuum generation in liquidfilled photonic. Photonic crystal fibers pcf are useful for supercontinuum generation due to the ability to engineer their dispersion and nonlinear properties 1. Supercontinuum generation in single crystal sapphire fibers. Modulation control and spectral shaping of optical fiber. Multiphoton microscopy ultrafast spectroscopy semiconductor device characterization supercontinuum generation optical coherence tomography. 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 theoretically propose a novel liquid filled suspended core photonic crystal fiber as a new class of microstructure optical fiber for ultrabroad supercontinuum generation. We get the optical bandwidth of the sc from 950 to 2400nm at the. 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. Us9176278b2 generating broadband spectral power in. 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. Broadband optical supercontinuum generation in a long.
In this letter, a new method for achieving ultraflat supercontinuum generation is proposed. Rp photonics encyclopedia supercontinuum generation. Supercontinuum is one of the most spectacular outcome of nonlinear optics. 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. 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.
The optical fiber based supercontinuum source has recently become a significant scientific and commercial success. Experiments and simulations carried out at 1550 nm indicate that the modal composition of the input beam can substantially alter the soliton fission process. How tapering fibers offers the best of both worlds for visible supercontinuum generation. 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. Visible supercontinuum generation in photonic crystal. 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. Supercontinuum generation in microstructured fibers and novel. Thus, many biophotonics applications were greatly enhanced by the use of fiber supercontinuum generation in the past decade table 1.
Supercontinuum generation in optical fibers updated source code. A new design of a gasfilled hollowcore optical fiber generates very broad supercontinuum light, spanning deep ultraviolet to near infrared. Supercontinuum generation in optical fibers request pdf. 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. As a first part, a bibliographic table gathers the literature on which this work is based. The scg800 supercontinuum fiber module is a polarizationmaintaining supercontinuum device for use with 800nm range femtosecond lasers. Generally speaking, the output spectrum depends upon the peak power, pulse width, and the center wavelength of the pump. Supercontinuum generation in tellurite optical fibers.
Dudley in chapter 3 of the book supercontinuum generation in. Lasers help produce music of a quality that was once the province of elaborate orchestras. 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. 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. Supercontinuum generation is a complicated nonlinear process for strong spectral broadening of light.
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. Fiber supercontinuum sources and their applications 30 october15 november 2012 123. The newport supercontinuum kit leverages the powerful combination of newports scg800 supercontinuum fiber module and high stability ultralign manual positioners. If nothing happens, download github desktop and try again. We employ an optical vortex beam for the generation of femtosecond supercontinuum in a solid state medium. We emphasize the advantage of liquid infiltration in enhancing the fiber nonlinearity. Supercontinuum generation in nonlinear optical fibers. Supercontinuum generation in photonic crystal fiber. 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 generation is the formation of broad continuous spectra by propagation of high power pulses.
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. The optical fiber based supercontinuum source has recently become a significant scientific and commercial success, with applications ranging from frequency comb production to. In addition, the compression causes additional nonlinear. Versatile supercontinuum generation in parabolic multimode. 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. In the normal dispersion regime, soliton dynamics are suppressed and the sc generation process is mainly due to selfphase modulation and optical wave breaking. In optics, a supercontinuum is formed when a collection of nonlinear processes act together. 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. The difference of sc generation is investigated by fabricating the tellurite mof and tapered tellurite mof at the same pumping condition. 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. Difference between ring laser gyroscope and fiber optic gyroscope.
A fourthorder rungekutta in the interaction picture method for simulating supercontinuum generation in optical fibers, j. We propose a new and efficient approach to generation of a continuouswave supercontinuum in optical fiber pumped by an amplified spontaneous emission light. Osa supercontinuum generation with optical vortices. Supercontinuum generation in optical fibers edited by j. We demonstrate that the continuum generation process is initiated by the filamentation of the vortex, resulting in a spatially divergent continuum. Floresrosas, initial development of supercontinuum. This repository contains the matlab source code for simulating pulse propagation and supercontinuum generation in optical fiber as described by j.
Semiconductor device characterization, supercontinuum generation, optical. Supercontinuum generation in microstructured fibers. Ultraflat supercontinuum generation in cascaded photonic. The education and training in optics and photonics conference. Extended blue supercontinuum generation in cascaded holey. Rediff mypage refind renren sina weibo sitejot skype slashdot sms stocktwits svejo symbaloo bookmarks threema. Such semiconductor fibers have enjoyed considerable attention due to their intrinsically high thirdorder nonlinearities, which are markedly higher than in conventional infrared glasses. By focusing hard enough a powerful laser beam in front of a sapphire plate, self. 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. Install the collimating objective 20x, after the scg800 and adjust it to collimate the output beam. Despite the strong selffocusing and the formation of multiple hotspots along the vortex ring, the singularity is preserved in both the near. What are the requirements for hnlf highly nonlinear fiber in xpm and in supercontinuum generation. Oct 16, 2017 this paper describes the stateoftheart in wavelength conversion and supercontinuum generation using glassclad silicon core optical fibers.
Highspectralflatness midinfrared supercontinuum generated. Osa versatile supercontinuum generation in parabolic. Taylor imperial college of science, technology and medicine, london. We demonstrate supercontinuum sc generation in tapered tellurite microstructure optical fiber mof. Supercontinuum generation in photonics crystal fibers. We theoretically investigate the nonlinear propagation of femtosecond pulses in liquidcore photonic crystal fibers filled with cs2. The layered spiral microstructured optical fiber lsmof design allows higher nonlinearities than the most common microstructured optical fibers. An experimental education package on optical fibre raman. Chalcogenide fiber is promising for mir sc generation because of its wide transmission window and high nonlinearity. Supercontinuum generation by photonic crystal fibers roland michaely.
Sapphire laser such as the tsunami or mai tai ultrafast oscillators. Limits of coherent supercontinuum generation in normal dispersion fibers alexander m. Ludvigsen fiberoptics group, department of electrical and communications engineering, helsinki university of technology. Resonanceenhanced multioctave supercontinuum generation. As tmdoped fiber could be used not only as the gain medium for 2. Broadband light sources are important for applications such as nonlinear microscopy, optical coherence tomography, frequency metrology, and ultra short pulse compression. A broadband spectral power generator in a multimode optical fiber utilizes a standard multimode fiber that is coiled. Scientists generate supercontinuum light source using liquid core optical fibers and reveal a new type of soliton dynamics. Supercontinuum generation in photonic crystal fibres with. In many cases, optical fibers are used for supercontinuum generation. Introduction to nonlinear effects involving in the process of supercontinuum generation. Our new approach uses the effect of stimulated stokes raman scattering in a low loss fiber.
Users may download and print one copy of any publication from the public. Dataset for wavelength conversion and supercontinuum. Supercontinuum generation in scg800 photonic crystal fiber. Blue extension of optical fibre supercontinuum generation. Femtosecond fiber lasers buccaneer del mar photonics. Supercontinuum generation with photonic crystal fibers and. 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. Design of allnormal dispersion microstructured optical.
Supercontinuum generation kit your source for fiber. Supercontinuum generation in optical fibers book code. Zheltikov physics department, international laser center, m. 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. Wavelength conversion and supercontinuum generation in silicon optical fibers. Supercontinuum generation in chalcogenide layered spiral. We report on a new and simple approach for continuous wave supercontinuum generation in optical fibers.
The accessories allow access to either particular spectral ranges or specific wavelengths within. Ico newsletter international commission for optics. 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. Fibre bragg grating and long period grating sensors in. Cambridge core electronic, optoelectronic devices, and nanotechnology supercontinuum generation in optical fibers edited by j. 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. Modulation control and spectral shaping of optical fiber supercontinuum generation in the picosecond regime.