Supercontinuum spectra are typically produced by inputting short femtosecond range high power pulses into a nonlinear medium. Supercontinuum generation in optical fibers updated and additional source code. Supercontinuum generation in microstructured fibers and. As a result large intensity robust light structures can propagate over significant distances. We demonstrate that the supercontinuum is compressible to a duration of 26 fs. We demonstrate the supercontinuum sc generation in a suspendedcore as 2 s 3 chalcogenide microstructured optical fiber mof. Taylor imperial college of science, technology and medicine, london. Modulation control and spectral shaping of optical fiber. Supercontinuum generation in large modearea microstructured. 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. To date, most of the experiments have been performed using highpeakpower nanosecond. Highly nonlinear fiber, supercontinuum, fiber laser, femtosecond laser, dispersion, polarization maintaining fiber. Supercontinuum generation from a photonic crystal optical fiber seen as a glowing thread on the left for gradually increasing intensity of a pump laser. Biophotonics applications of supercontinuum generation c. Based on numerical simulations, our paper is intended to provide experimental design guidelines tailored ytterbium and erbiumbased pumps around 1060 and 1550 nm, respectively. Interaction of fourwave mixing and stimulated raman scattering in optical fibers s. In many cases, optical fibers are used for supercontinuum generation. Supercontinuum generation in photonic crystal fiber. Microstructure core photonic crystal fiber for blue extension.
Never worry about misplacing the manual to your nkt photonics laser. Supercontinuum generation with picosecond ultraviolet pulses. The broadband supercontinuum sc generation in optical fibers currently attracts a lot of attention because of the high potential for applications in the fields of the optical communications, optical coherence tomography oct, optical metrology, time resolved absorption and spectroscopy 37. Supercontinuum generation in the irregular point of hollow. Of special interest are photonic crystal fibers, mainly due to their unusual chromatic.
The study of supercontinuum sc generation in photonic crystal fibers pcf continues to be an area of active research, motivated by many applications in biophotonics, optical metrology, spectroscopy, and imaging. Taylor, ten years of nonlinear optics in photonic crystal fibre, nature photon. Supercontinuum generation in optical fibers article pdf available in proceedings of spie the international society for optical engineering november 2007 with 1,452 reads how we measure reads. Supercontinuum generation in pcfs has subsequently been widely applied in interdisciplinary. Supercontinuum generation from in tense partially coherent. Supercontinuum generation in optical fibers updated source code. 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. 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.
The higher the pump intensity, the broader the supercontinuum. 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 in both standard and polarization maintaining hnlf are studied. 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.
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. Perhaps more interesting is the soliton dynamics involved in the supercontinuum generation, and our ability to tailor the optical. Superk evo safety, handling and regulatory information. We investigate photonic crystal fibers pcfs with nanosize airholes nahs in the core for the blue extension of supercontinuum generation. The newport supercontinuum kit leverages the powerful combination of newports scg800 supercontinuum fiber module and high stability ultralign manual positioners. Todate, pcf generated supercontinuum has found applications in frequency comb spectroscopy, nonlinear spectroscopy, optical coherence tomography. We demonstrate supercontinuum generation in a photonic crystal fiber with allnormal group velocity dispersion. Supercontinuum generation in photonics crystal fibers pcf has attracted considerable attention in recent years because of its wide applications ranging from spectroscopy and metrology to telecommunications. Recent advances in nonlinear optical media, particularly various optical fibers significantly relax the requirements for supercontinuum generation. Supercontinuum generation in large modearea microstructured fibers is demonstrated by launching into the fiber ns pulses from a passively qswitched nd. The possibility of soliton propagation in the anomalous gvd regime of optical fibers was first suggested from theoretical analysis of the nonlinear schrodinger. Although many previous reports on sc generation have used pcfs pumped with near infrared or. Highly nonlinear fibers for very wideband supercontinuum. Fundamental noise limitations to supercontinuum generation in.
Supercontinuum generation in photonics crystal fibers. Supercontinuum generation in microstructured fibers and novel. Osa intracavity supercontinuum generation in a mode. Sep 11, 2009 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. Mid lnfrared supercontinuum generation in photonic crystal fiber guidelines. Boppart biophotonics imaging laboratory, beckman institute for advanced science and technology. 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. The supercontinuum source shown is build from a nl1040 pcf pumped by a nanosecond 1064. Effective soliton fusion process at the advanced stage of. Ultra wide band supercontinuum generation in air silica holey fibers by shginduced modulation instabilities optics express 19, 73997404, 2005.
The generation of nonlinear effects takes advantage of the large nonlinear refractive index and raman gain of the. Dispersion optimized for 1060 nm or 780 nm wavelength pumping, pure silica core, low losses. The principle behind the design is to enhance the evanescent wave in the ir part of the supercontinuum. 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. Optical frequency upconversion by supercontinuumfree. Seeded supercontinuum generation with optical parametric downconversion d. Superk extreme safety, handling and regulatory information. Since the dispersion in a photonic crystal fiber can be tailored to facilitate the generation of supercontinuum spectra in a specific region, nonlinear photonic crystal fibers are an attractive media. The variation of sc is investigated by changing the fiber length, pump peak. Supercontinuum generation in optical fibers request pdf. Supercontinuum generation in photonic crystal fibers. In the spectral domain fusionlike processes result in development of a new significant band at. Osa limits of coherent supercontinuum generation in normal. Fiber birefringence is an important optical property, which has been exploited in coherent optical communications as well as in the fabrication of fiber optic sensors.
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. Highspectralflatness midinfrared supercontinuum generated. Dudley in chapter 3 of the book supercontinuum generation in optical fibers edited by j. Fdoct supercontinuum hsu ij, lu cw, deng cr, et al. After a brief introduction on pulse propagation in optical. Fiber sources of tailored supercontinuum in nonlinear. We study the largely unexplored transition between coherent and noiseseeded incoherent continuum generation in allnormal dispersion andi fibers and show that highly coherent supercontinua with spectral bandwidths of one octave can be generated with long pump pulses of up to 1. Solid core photonic band gap fibers have been also investigated to generate supercontinuum in the visible region 65. Here you can download all the recent product manuals in pdf. Optical frequency upconversion by supercontinuumfree widelytunable fiberoptic cherenkov radiation haohua tu and stephen a. Numerical simulations are used to study how fiber supercontinuum generation seeded by picosecond pulses can be actively controlled through the use of input pulse modulation.
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. 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. This laser achieves modelocking based on the mamyshev mechanism and realizes supercontinuum generation spanning from 30 nm to 2030 nm directly. The scg800 supercontinuum fiber module is a polarizationmaintaining supercontinuum device for use with 800nm range femtosecond lasers. Rp photonics encyclopedia supercontinuum generation. In the spectral domain fusionlike processes result in development of a new significant band at the long wavelength side of the spectrum.
Dispersion for tapered fiber and supercontinuum generation inaoe, 27042011 33 2. Supercontinuum generation in microstructured silica optical fibers. Pdf coherent supercontinuum generation in photonic crystal. More than an octavespanning sc generation was demonstrated from specialty optical fibers such as highly nonlinear fiber 7, photonics crystal fiber 8, dispersion shifted fiber 9, and small. Supercontinuum generation in optical fibers dudley j. An allfiber supercontinuum laser source with a piece of highly nonlinear fiber inserted into a modelocked fiber laser is experimentally demonstrated. Supercontinuum generation by photonic crystal fibers. Supercontinuum generation in optical fibers edited by j. Recently, the generalized nlse has proven similarly successful in describing supercontinuum generated in microstructure fiber 1215. 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. The special properties of these fibers open the way to compact, singlemode, highpower supercontinuum sources with a low divergence of the output beam. Abstractsupercontinuum sc with a continuous spectrum from.
Midinfrared supercontinuum generation in a suspendedcore. Supercontinuum generation due to slow nonlinear response in a liquid filled photonic. Introduction supercontinuum generation in highly nonlinear fibers hnlf pumped with femtosecond pulses is an area of. On the right, the spectrum of the supercontinuum is shown after the output beam passed through a prism. Supercontinuum generation in bulk media, and in more conventional optical fibers, has been successfully described by the generalized nonlinear schrodinger equation nlse 11. Supercontinuum generation in highly gedoped core yshaped. Pdf supercontinuum generation in optical fibers researchgate. Visible supercontinuum generation controlled by intermodal fourwave mixing in microstructured fiber optics letters 32 15, 21732175, 2007. Supercontinuum light with a spectrum more than two octaves broad 3701545 nm at the 20db level was generated in a standard telecommunications fiber by femtosecond pulses from an unamplified ti. Figure 6 supercontinuum formed with pumping at different wavelengths in a fiber with zero dispersion at approximately 900 nm.
Frequencytunable supercontinuum generation in photonic. Mid infrared supercontinuum generation in photonic crystal. Design of supercontinuum generating photonic crystal fiber at. Finally, the generation of broad comblikespectral light based on the pulse compression of 40ghz optical pulses in a new nonlinear dispersiondecreasing fiber. Recently, the generalized nlse has proven similarly successful in describing supercontinuum generated in. Supercontinuum generation in scg800 photonic crystal fiber. Inaoe, 11042012 1 supercontinuum generation in optical fibers e. Blue extension of optical fibre supercontinuum generation.
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