Wide-band supercontinuum generation in mid-IR using polarization maintaining chalcogenide photonic quasi-crystal fiber.
TL;DR: The proposed PQF-based SC source is a good candidate for applications such as optical sensing, frequency metrology, and optical tomography as the two orthogonally polarized modes allow the high degree of freedom in tuning the properties of the SC.
Abstract: We report a polarization maintaining chalcogenide (ChG) photonic quasicrystal fiber (PQF) for wide-band mid-IR (MIR) supercontinuum (SC) generation The numerical demonstration of SC generation in the proposed PQF spans from 2 to 15 μm wavelengths for a pulse power of 2 kW Besides, the proposed PQF offers a high birefringence (10−3 to 10−2) from 35 to 15 μm wavelengths and exhibits a low confinement loss (10−7 to 10−1) for the wavelengths from 2 to 15 μm with single mode behavior The proposed Ge115As24Se645 PQF is designed with zero dispersion wavelengths (ZDWs) at 433 and 446 μm for X and Y polarized modes within the wavelength range of 2–15 μm The polarized spectral broadening of the continuum is realized for the first time from 2 to 15 μm using the proposed PQF with a length of 8 mm Hence, the two orthogonally polarized modes allow the high degree of freedom in tuning the properties of the SC Thus, the proposed PQF-based SC source is a good candidate for applications such as optical sensing, frequency metrology, and optical tomography
Citations
More filters
01 Jan 2002
TL;DR: In this article, a 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.
Abstract: 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. Results from numerical simulations are used to discuss the temporal and spectral characteristics of the supercontinuum, and to interpret the physics of the underlying spectral broadening processes. Particular attention is given to the case of supercontinuum generation seeded by femtosecond pulses in the anomalous group velocity dispersion regime of photonic crystal fiber, where the processes of soliton fission, stimulated Raman scattering, and dispersive wave generation are reviewed in detail. The corresponding intensity and phase stability properties of the supercontinuum spectra generated under different conditions are also discussed.
360 citations
TL;DR: In this article, an ultra-broadband coherent mid-infrared supercontinuum (SC) extending from 1.25 to 20μm was generated using a novel AsSe2-As2S5 multimaterial photonic crystal fiber (PCF).
Abstract: In this paper, we report on the simulation of an ultra-broadband coherent mid-infrared supercontinuum (SC) extending from 1.25 to 20 μm generated using a novel AsSe2-As2S5 multimaterial photonic crystal fiber (PCF). The proposed fiber is composed of a core made of AsSe2 glass and a surrounding cladding made of As2S5 glass. The hybrid PCF is designed to have a zero-dispersion wavelength (ZDW) of 3.3 μm with an overall highly engineered group velocity dispersion shifted to the mid-infrared wavelength region. The SC is generated by pumping 50 fs pulses at 4 μm emitted from an optical parameter amplifier with low energy of 0.625 nJ. The pumping wavelength is selected in the anomalous dispersion regime close to the ZDW. The widening of the SC is mainly based on the soliton effects in the anomalous dispersion region combined with self-phase modulation, cross-phase modulation, stimulated Raman scattering, four-wave mixing, and dispersive wave. The obtained SC shows a high degree of coherence and a 15 fs temporal compressed pulse is generated in only 5 mm long AsSe2-As2S5 hybrid PCF. The power proportion of the SC generated beyond 4 μm is 98% with its long wavelength edge up to 20 μm. To the best of our knowledge, the obtained SC is the first broadest spectrum reported in the mid-infrared region with very low energy. Our results highlight the potential of the novel chalcogenide AsSe2-As2S5 multimaterial PCF to emit across the ultra-broadband mid-infrared atmospheric windows and the molecular fingerprint region.
22 citations
TL;DR: In this paper, a polarization-maintaining CS2-core photonic crystal fiber is designed and it is demonstrated that the x-polarization fundamental mode has an all-normal dispersion profile and the corresponding y-polarsization fundamental modes has an anomalous dispersion profiles for a pump wavelength of 1.76 μm.
Abstract: In this paper, we design a polarization-maintaining CS2-core photonic crystal fiber (PM-CCPCF). The two air holes in the x direction are infiltrated with C2H5OH in order to introduce birefringence. By optimizing the structure parameters of the PM-CCPCF, it is demonstrated that the x-polarization fundamental mode has an all-normal dispersion profile and the corresponding y-polarization fundamental mode has an anomalous dispersion profile for a pump wavelength of 1.76 μm. Then, we investigate the supercontinuum (SC) generations when different fiber lengths, pump peak powers, and pump pulse widths are chosen, respectively. Simulation results show that for the x-polarization and y-polarization fundamental modes, highly coherent SCs can be generated by appropriately choosing the fiber length and pump pulse parameters. Finally, nonlinear propagation dynamics are analysed when the optimized fiber length and pump pulse parameters are used. The bandwidth of the SCs generated for the x-polarization and y-polarization fundamental modes can be up to 0.82 and 1.26 octave, respectively.
18 citations
01 Jan 2020
TL;DR: In this article, the authors present a survey of the applications of supercontinuum sources and apply them to the field of littérature, including the use of microspectroscopies.
Abstract: .................................................................................................................................... III TABLE DES MATIERES ............................................................................................................... IV LISTE DES TABLEAUX................................................................................................................. VI LISTE DES FIGURES ................................................................................................................... VII LISTE DES ABBREVIATIONS ET DES ACRONYMES ........................................................... XI REMERCIEMENTS ..................................................................................................................... XIV AVANT-PROPOS ..........................................................................................................................XV 0. INTRODUCTION .................................................................................................................... 1 0.1 Les motivations ......................................................................................................................................................... 1 0.2 Pourquoi le supercontinuum (en bref...) ? ..................................................................................................... 1 0.3 Pourquoi l’infrarouge moyen? ............................................................................................................................ 2 0.4 Pourquoi la fibre optique? .................................................................................................................................... 4 1. CHAPITRE 1 : BASES THEORIQUES ET APPLICATIONS SUR LA GENERATION DE SUPERCONTINUUM ............................................................................................................... 6 1.1 Applications des sources de supercontinuum .............................................................................................. 7 1.1.1 La télédétection ..................................................................................................................................................................... 8 1.1.2 La microspectroscopie .................................................................................................................................................... 14 1.2 Revue de littérature ............................................................................................................................................. 19 1.2.1 Les lasers de pompage disponibles émettant dans le mid-IR ...................................................................... 19 1.2.2 Les SC pompés par des lasers à l’état solide ......................................................................................................... 28 1.2.3 Les SC pompés par des lasers à fibre optique ...................................................................................................... 33 1.2.4 Conclusion de la revue de littérature ....................................................................................................................... 38 1.3 La fibre optique, sa conception et l’optique linéaire ............................................................................... 39 1.3.1 La fibre optique à saut d’indice ................................................................................................................................... 39 1.3.2 Le choix des verres ............................................................................................................................................................ 40 1.3.3 La constante de propagation et la dispersion de guidage .............................................................................. 44 1.3.4 Les techniques pour ajuster la dispersion de guidage ..................................................................................... 45
12 citations
01 Mar 2020
TL;DR: In this article, both the birefringence and dispersion properties of a polarization-maintaining chalcogenide (ChG) photonic crystal fiber are numerically investigated by means of the finite element method.
Abstract: The photonic crystal fiber (PCF) with a bunch of air holes enclosing the silica core field has momentous and compelling attributes when compared with the ordinary single-mode fibers. In this work, both the birefringence and dispersion properties of a polarization-maintaining chalcogenide (ChG) photonic crystal fiber are numerically investigated by means of the finite element method. Through simulation, it is found that the birefringence of the proposed $${\mathrm{G}\mathrm{e}}_{11.5}{\mathrm{A}\mathrm{s}}_{24}{\mathrm{S}\mathrm{e}}_{64.5}$$
PCF can reach as high as $$0.03$$
when compared with the conventional fiber that has merely $$5\times {10}^{-4}$$
for wavelengths in the 2–10
$$\upmu \mathrm{m}$$
range. The PCF is designed with zero-dispersion wavelengths for x- and y-polarized modes in the 2–10
$$\upmu \mathrm{m}$$
range. It is also observed that over the entire MIR wavelength range, the GVD remains positive and has a maximum value of 30,000 ps2/nm-km. Hence, the proposed $${\mathrm{G}\mathrm{e}}_{11.5}{\mathrm{A}\mathrm{s}}_{24}{\mathrm{S}\mathrm{e}}_{64.5}$$
PCF plays the dual role of acting as a very good polarization-maintaining fiber due to its very high birefringence and an excellent dispersion-compensating fiber due to its large positive GVD. This $${\mathrm{G}\mathrm{e}}_{11.5}{\mathrm{A}\mathrm{s}}_{24}{\mathrm{S}\mathrm{e}}_{64.5}$$
PCF serves as a very good candidate for ultra-broadband high bit-rate transmission. Supercontinuum generation is another important application of PCF. Supercontinuum generation is a generation of coherent and broadband light. SC generation in PCFs has several applications in optical coherence tomography (OCT), optical frequency metrology (OFM), pulse compression, and design of ultrafast femtosecond laser pulses.
9 citations
References
More filters
04 Oct 2006
TL;DR: In this paper, a 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.
Abstract: 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. Results from numerical simulations are used to discuss the temporal and spectral characteristics of the supercontinuum, and to interpret the physics of the underlying spectral broadening processes. Particular attention is given to the case of supercontinuum generation seeded by femtosecond pulses in the anomalous group velocity dispersion regime of photonic crystal fiber, where the processes of soliton fission, stimulated Raman scattering, and dispersive wave generation are reviewed in detail. The corresponding intensity and phase stability properties of the supercontinuum spectra generated under different conditions are also discussed.
3,361 citations
18 Feb 2000
TL;DR: In this paper, the optical properties of a photonic crystal fiber including a plurality of longitudinal holes are altered by virtue of the change in cross-sectional area of holes in that region.
Abstract: A photonic crystal fibre including a plurality of longitudinal holes (220), in which at least some of the holes have a different cross-sectional area in a first region (200) of the fibre, that region having been heat-treated after fabrication of the fibre, from their cross-sectional area in a second region of the fibre (190), wherein the optical properties of the fibre in the heat-treated region (200) are altered by virture of the change in cross-sectional area of holes (230) in that region (200).
1,394 citations
TL;DR: In this article, a record-breaking spectral coverage of 1.4-13.3 µm was achieved by launching intense ultra-short pulses into short pieces of ultra-high numerical aperture step-index chalcogenide glass optical fiber consisting of a GaAsSe cladding and an As2Se3 core.
Abstract: Mid-infrared supercontinuum generation with a record-breaking spectral coverage of 1.4–13.3 µm is demonstrated by launching intense ultra-short pulses into short pieces of ultra-high numerical aperture step-index chalcogenide glass optical fibre consisting of a GaAsSe cladding and an As2Se3 core.
785 citations
TL;DR: In this article, the authors provide a concise and critical summary of the current state of nonlinear optics in photonic crystal fiber, identifying some of the most important and interesting recent developments in the field.
Abstract: The year 2009 marks the tenth anniversary of the first report of white-light supercontinuum generation in photonic crystal fibre. This result had a tremendous impact on the field of nonlinear fibre optics and continues to open up new horizons in photonic science. Here we provide a concise and critical summary of the current state of nonlinear optics in photonic crystal fibre, identifying some of the most important and interesting recent developments in the field. We also discuss several emerging research directions and point out links with other areas of physics that are now becoming apparent.
383 citations
TL;DR: The extension of broadband degenerate OPO operation further into mid-infrared by synchronously pumps a 500-μm-long crystal of orientation patterned GaAs providing broadband gain centered at 4.1 µm is reported.
Abstract: We report the extension of broadband degenerate OPO operation further into mid-infrared. A femtosecond thulium fiber laser with output centered at 2050 nm synchronously pumps a 500-μm-long crystal of orientation patterned GaAs providing broadband gain centered at 4.1 µm. We observe a pump threshold of 17 mW and output bandwidth extending from 2.6 to 6.1 µm at the −30 dB level. Average output power was 37 mW. Appropriate resonator group dispersion is a key factor for achieving degenerate operation with instantaneously broad bandwidth. The output spectrum is very sensitive to absorption and dispersion introduced by molecular species inside the OPO cavity.
277 citations