In past ten years, supercontinuum generation scg in photonic crystal fiber pcf,, have attracted extensive attention due to the potential for sensing techniques, pulse compression, dispersion measurements, all optical telecommunication, and source for optical coherence tomography with ultrahigh resolution in biological tissue. Dispersion optimized for 1060 nm or 780 nm wavelength pumping, pure silica core, low losses. Highspectralflatness midinfrared supercontinuum generated from a tmdoped fiber amplifier. Oct 16, 2017 this paper describes the stateoftheart in wavelength conversion and supercontinuum generation using glassclad silicon core optical fibers. Blue extension of optical fibre supercontinuum generation. This repository contains the matlab source code for simulating pulse propagation and supercontinuum generation in optical fiber as described by j. 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.
Power scalable midinfrared supercontinuum generation in zblan fluoride fibers with up to 1. The special properties of these fibers open the way to compact, singlemode, highpower supercontinuum sources with a low divergence of the output beam. Scgbookcode supercontinuum generation in optical fibers updated and additional source code. Supercontinuum generation by photonic crystal fibers. Supercontinuum generation in silica photonic crystal fiber at. 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. Highly nonlinear fibers for very wideband supercontinuum. Resonanceenhanced multioctave 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 in the near infrared range, obtaining a broadband supercontinuum. Scientists generate supercontinuum light source using liquid core optical fibers and reveal a new type of soliton dynamics. The supercontinuum source shown is build from a nl1040 pcf pumped by a nanosecond 1064. Supercontinuum generation in nonlinear optical fibers. Dudley in chapter 3 of the book supercontinuum generation in optical fibers edited by j. Taylor imperial college of science, technology and medicine, london.
Supercontinuum generation from in tense partially coherent. Superflat supercontinuum generation from a tmdoped fiber. Supercontinuum generation in optical fibers updated source code. Supercontinuum generation with photonic crystal fibers and its application in nanoimaging. 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 both standard and polarization maintaining hnlf are studied. When femtosecond pulses are used, the spectral broadening can be dominantly caused by selfphase modulation. Inaoe, 11042012 2 outline short historical background on. Supercontinuum generation in scg800 photonic crystal fiber. Supercontinuum generation in large modearea microstructured fibers is demonstrated by launching into the fiber ns pulses from a passively qswitched nd.
Versatile supercontinuum generation in parabolic multimode. Supercontinuum generation in microstructured fibers and. The generation of nonlinear effects takes advantage of the large nonlinear refractive index and raman gain of the. Supercontinuum generation in microstructured silica optical fibers. Introduction supercontinuum sc generation in optical fiber is a complex process of interplaying of kerr effect, raman effect, and dispersion properties of fiber, it has been widely demonstrated and well understood in all pump.
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. Pier m online highly coherent supercontinuum generation. Frequencytunable supercontinuum generation in photonic. Supercontinuum generation in highly gedoped core yshaped.
Theoretically, a nonlinear polarization rotation modelocked laser adopting an allfiber structure serves as the oscillating stage, the output seed light is amplified and then coupled into highnonlinearity photonic crystal fibers for nonlinear broadening so as. The invention discloses a compact allfiber supercontinuum whitelight source, and relates to the field of whitelight laser sources. Multiwdmchannel gbits pulse generation from a single laser source utilizing ldpumped supercontinuum in optical fibers, ieee photonics. The propagation of short and intense optical pulses through a nonlinear optical fiber is described by the. Experiments and simulations carried out at 1550 nm indicate that the modal composition of the input beam can substantially alter the soliton fission process. Inaoe, 11042012 1 supercontinuum generation in optical fibers e. Osa flat supercontinuum generation in cascaded fibers. We demonstrate the supercontinuum sc generation in a suspendedcore as 2 s 3 chalcogenide microstructured optical fiber mof. Supercontinuum generation in the irregular point of hollow. Rp photonics encyclopedia supercontinuum generation. The term supercontinuum does not cover a specific phenomenon but rather a plethora of nonlinear effect leading to considerable spectral broadening of optical pulses and. Mid lnfrared supercontinuum generation in photonic crystal fiber guidelines. Fdoct supercontinuum hsu ij, lu cw, deng cr, et al. Supercontinuum generation with photonic crystal fibers and.
Supercontinuum sc generation has become an active research topic over the last few years 12 3 456789 because of its unique application in diverse fields, such as in optical. We realize the flattening and extending of a cwpumped supercontinuum with a high spectral intensity peak at the pump region. The fiber is easy to fabricate due to its simple structure and shows good compatibility with standard fiber. Stentz, visible continuum generation in airsilica microstructure optical fibers with anomalous dispersion at 800 nm. Highspectralflatness midinfrared supercontinuum generated. Highly nonlinear fiber, supercontinuum, fiber laser, femtosecond laser, dispersion, polarization maintaining fiber. Mid infrared supercontinuum generation in photonic crystal. Such semiconductor fibers have enjoyed considerable attention due to their intrinsically high thirdorder nonlinearities, which are markedly higher than in conventional infrared glasses. 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. Recent advances in nonlinear optical media, particularly various optical fibers significantly relax the requirements for supercontinuum generation.
The proposed configuration initially has an input pulse with hyperbolic secant profile to generate noiselike pulses as output signal, by the rungekutta method rk4ip. Main motivation to use sapphire fibers as optical media for supercontinuum generation is that they have characteristics of good transparency in midir, high laser damage threshold. Introduction supercontinuum sc generation in optical fiber is a complex process of interplaying of kerr effect, raman effect, and dispersion properties of fiber, it has been. Generally speaking, the output spectrum depends upon the peak power, pulse width, and the center wavelength of the pump. Infrared supercontinuum generation and aging challenges in sulfurbased chalcogenide glasses suspended core highly non linear optical fibers oussama mouawad to cite this version. Apr 01, 2010 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 imaging. Supercontinuum generation in optical fibers edited by j. The role of the second zdw is examined for 5 fiber designs where the higher zdw differs while the lower zdw is almost the same for all fibers. Infrared supercontinuum generation and aging challenges in. 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. 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. Supercontinuum generation from a photonic crystal optical fiber seen as a glowing thread on the left for gradually increasing intensity of a pump laser. Ultrafast supercontinuum generation in gasfilled waveguides is an enabling technology for many intriguing applications ranging from attosecond metrology towards biophotonics, with the amount of.
Perhaps more interesting is the soliton dynamics involved in the supercontinuum generation, and our ability to tailor the optical. Wavelength conversion and supercontinuum generation in. Dramatic advances in supercontinuum generation have been made recently using photonic crystal fibers, but it is quite challenging to obtain an octavespanning supercontinuum on a chip, partially because of. Supercontinuum generation in untapered and tapered. It is achieved by cascading a long zerodispersion wavelength highnonlinearity fiber with the output photonic crystal fiber, in order to improve the conversion efficiency of residual pump energy to longwavelength continuum based on the effect of cascaded stimulated. Supercontinuum generation in optical fibers updated.
Supercontinuum generation in optical fibers updated and additional source code. 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 imaging. Supercontinuum generation in photonic crystal fiber. Recently, supercontinuum generation using photonic crystal fiber pcf got much attention by researcher and was rapidly applied into various applications including optical coherence tomography. Supercontinuum generation in silica photonic crystal fiber. Dispersion of photoniccrystal fibers supercontinuum generation, as mentioned above, is often a result of the joint action of many nonlinear optical processes involving the generation of new spectral components and spectral broadening of these components. Supercontinuum generation in microstructured fibers and novel. 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. The variation of sc is investigated by changing the fiber length, pump peak. Supercontinuum generation in photonics crystal fibers. Supercontinuum generation in optical fibers request pdf. Infrared supercontinuum generation in softglass fibers. We report experimental results on supercontinuum generation in a highly gedoped core yshaped microstructured optical fiber using pump pulses of 9 ns duration at 1064 nm. Supercontinuum generation is the formation of broad continuous spectra through propagation of short high power pulses through nonlinear media and was first observed in 1970.
In this dissertation, supercontinuum generations in sapphire fibers under various conditions are investigated, and their corresponding effects are analyzed. Supercontinuum generation with fixedwavelength lasers. Onchip twooctave supercontinuum generation by enhancing. Supercontinuum generation in photonic crystal fibers with two zero dispersion wavelengths zdws is investigated numerically. With the use of the supercontinuum generation fiber devices, you eliminate the need for morecomplex laser systems like cavity dumped oscillators or two synchronized oscillators. Midinfrared supercontinuum generation in a suspendedcore. The accessories allow access to either particular spectral ranges or specific wavelengths within. The standard fiber length can be made very short few mms to reduce added dispersion and the splicing can. Supercontinuum generation from in tense partially coherent laser beams in optical fibers p. This paper describes the stateoftheart in wavelength conversion and supercontinuum generation using glassclad silicon core optical fibers. The sturdy metal barrel package contains a 12 cm long pcf, with fiber ends sealed and mounted in quartz ferrules. 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. To further enhance the coupling stability, the fiber may be spliced to a larger core standard fiber. Todate, pcf generated supercontinuum has found applications in frequency comb spectroscopy, nonlinear spectroscopy, optical coherence tomography.
The fact that only an oscillator with a few nj of energy is required to generate supercontinuum makes the pcfbased sources reliable, affordable and relatively simple to operate. In this work, we performed a numerical analysis of the supercontinuum spectrum generation in a couple of photonic crystal fibers with different structure. Infrared supercontinuum generation and aging challenges in sulfurbased chalcogenide glasses suspended core highly non linear optical fibers. This oneofakind book explains the theory of fiber supercontinuum broadening, describes the diverse operational regimes and indicates principal areas of applications.
In past ten years, supercontinuum generation scg in photonic crystal fiber pcf,, have attracted extensive attention due to the potential for sensing techniques, pulse compression, dispersion measurements, alloptical telecommunication, and source for optical coherence tomography with ultrahigh resolution in biological tissue. Supercontinuum generation in nonsilica fibers eprints soton. The higher the pump intensity, the broader the supercontinuum. Results to date from small core silicon fibers fabricated using. Photonic crystal fibers pcfs are suitable for supercontinuum generation because of their capability of strong modal confinement and tailorable dispersion properties to maximize bandwidth of generated optical spectrum. Cn102916328a compact allfiber supercontinuum white. Modulation control and spectral shaping of optical fiber. On the right, the spectrum of the supercontinuum is shown after the output beam passed through a prism. For the aim of enhancing the axial resolution, we propose supercontinuum generation in optical fibers at 1. The waveguide nature of optical fibers permits that a laser beam can be confined in a small area and sustain its high intensity over a long distance with negligible. Numerical analysis of the supercontinuum spectrum generation. In many cases, optical fibers are used for supercontinuum generation. The proposed configuration initially has an input pulse with hyperbolic secant profile to generate noiselike pulses.
1139 1392 425 740 962 140 613 409 1358 68 1141 1066 1348 973 831 106 556 512 1064 666 783 806 1416 1405 350 525 999 978 184 283 460 817