A novel method, sputtering K9 glass film, is proposed to solve the surface corrosion of Er-doped phosphate glass during ion-exchange processing for optical waveguide fabrication. The corrosion causes are analyzed to b...A novel method, sputtering K9 glass film, is proposed to solve the surface corrosion of Er-doped phosphate glass during ion-exchange processing for optical waveguide fabrication. The corrosion causes are analyzed to be the intrinsically weak stabilization of phosphate glass structure, hydrophile and weakly acidic property of phosphate radical. Experimental results show that the K9 glass film could not only protect the Er-doped phosphate glass surface from being corroded but also give no influence on the waveguide fabrication. The effect of thickness of K9 glass film on the optical property of waveguide is also investigated and the op- timal thickness is found to be 60―80 nm. It provides a good base for further fabri- cation of active phosphate glass optical waveguide devices.展开更多
Transitions of laser diode （LD） pumped Er^3＋-yb^3＋ co-doped glass laser are rather complicated. Considering energy transfer between Er^3＋ and Yb^3＋ ions, cross-relaxation, upconversion luminescence, and other tr...Transitions of laser diode （LD） pumped Er^3＋-yb^3＋ co-doped glass laser are rather complicated. Considering energy transfer between Er^3＋ and Yb^3＋ ions, cross-relaxation, upconversion luminescence, and other transition processes, rate equations of quasi-three energy-level-system of the Er^3＋-yb^3＋ co-doped laser are presented. The output characteristics are also calculated and analyzed in detail. The results show that Er^3＋-yb^3＋ co-doped phosphate waveguide lasers with high slope efficiency and low threshold can be achieved.展开更多
Er^3＋-doped Na2O-WO3-TeO2 glass consistent with standard ion-exchange technology has been fabricated and characterized. The measured absorption and emission spectra of the glass were analyzed by the Judd-Ofelt and Mc...Er^3＋-doped Na2O-WO3-TeO2 glass consistent with standard ion-exchange technology has been fabricated and characterized. The measured absorption and emission spectra of the glass were analyzed by the Judd-Ofelt and McCumber theories. The intensity parameters are Ω2 = 7.01×10^-20cm^2, Ω4 = 1.80 × 10^-20 cm^2, Ω6= 1.03 × 10^-20 cm^2. The maximum emission cross-section is 0.91 × 10^-20 cm^2 at 1.533μm, and a broad 1.5μm emission spectrum of 65-nm full width at half-maximum （FWHM） is demonstrated. Glass transition temperature, crystallization onset temperature, density, refractive index are also reported for reference in the design and modelling of the ion-exchange process.展开更多
Ag nanoparticles embedded in soda-lime silicate glass were fabricated by ion-exchange and subsequently annealing method. Effects of annealing duration on the optical nonlinearity and ultrafast dynamics of Ag nanoparti...Ag nanoparticles embedded in soda-lime silicate glass were fabricated by ion-exchange and subsequently annealing method. Effects of annealing duration on the optical nonlinearity and ultrafast dynamics of Ag nanoparticles in glass were investigated by z-scan technique and pump-probe technique. The results indicate that the third-order optical nonlinearity increases with extending the annealing time, the fast decay process with lifetime of a few picoseconds is attributed to thermal equilibrium process of hot electrons and the energy transfer to lattices by interaction with phonons in the formed Ag nanoparticles, while the slow decay in more than one hundred picoseconds corresponds to the subsequent cooling process by a thermal diffusion from the Ag nanoparticle to the host matrix via the phonon-medium interaction. The fast decay process is accelerated with extending the annealing time.展开更多
To control second harmonic generation (SHG) in silica-based glasses is crucial for fabricating photonic devices, such as frequency doubling waveguides. Here, we investigated SHG of laser induced nonlinear optical crys...To control second harmonic generation (SHG) in silica-based glasses is crucial for fabricating photonic devices, such as frequency doubling waveguides. Here, we investigated SHG of laser induced nonlinear optical crystals in silica-based glasses, according to writing speed and pulse energy. We observed two regions with different probing laser polarization angular dependence: a) a well-defined cosine-like curve with period of 180° at low pulse energy (0.8 μJ) whatever the writing speed or at high pulse energy (1.4 μJ) with high writing speed (25 μm/s). This is accounted for by a well-defined texture for the nano crystals with their polar axis oriented perpendicular to the writing laser polarization;and b) a double cosine-like curve revealing a second texture of the crystals at high pulse energy (1.4 μJ) with low writing speed (5 μm/s) and with the polar axis oriented closer parallel to the writing laser polarization. Therefore, a SHG dependence on probing laser polarization angle may show high contrast by a correct choice of the writing speed and pulse energy. These results pave the way for elaboration of nonlinear optical devices.展开更多
A racetrack waveguide resonator filter was fabricated by ion exchange technology in K9 optical glass. The filter responses of the waveguide resonator were measured with two polarized input lightwaves. The polarization...A racetrack waveguide resonator filter was fabricated by ion exchange technology in K9 optical glass. The filter responses of the waveguide resonator were measured with two polarized input lightwaves. The polarization-dependent characteristics of the waveguide resonator were analyzed, and the results of effective indices of nTE=1.5721 and nTM = 1.5548, coupling ratios of rTE = 0.731 and rTM = 0.761, and losses of αTE = 4.35 dB/cm and αTM = 6.05 dB/cm were obtained for transverse electric （TE） and transverse magnetic （TM） modes, respectively. The causes of large loss and effective index differences between TE and TM modes were discussed.展开更多
Ion implantation has played a unique role in the fabrication of optical waveguide devices.Tb'-doped aluminum borosilicate(TDAB)glass has been considered as an important magneto-optical material.In this work,near-i...Ion implantation has played a unique role in the fabrication of optical waveguide devices.Tb'-doped aluminum borosilicate(TDAB)glass has been considered as an important magneto-optical material.In this work,near-infrared waveguides have been manufactured by the(5.5+6.0)MeV C^3+ion implantation with doses of(4.0+8.0)×10^13 ions·cm^-2 in the TDAB glass.The modes propagated in the TDAB glass waveguide were recorded by a prism-coupling system.The finite-difference beam propagation method(FD-BPM)was carried out to simulate the guiding characteristics of the TDAB glass waveguide.The TDAB glass waveguide allows the light propagation with a single-mode at 1.539μm and can serve as a potential candidate for future waveguide isolators.展开更多
在光学玻璃基片上制作了双层掩埋式多模光波导芯片,这种芯片中的上、下两层光波导均通过熔盐离子交换和电场辅助离子迁移形成。对光波导的横截面以及输出光斑进行了观察,并进行了损耗和串扰测试。研究结果表明:双层多模光波导芯片中上...在光学玻璃基片上制作了双层掩埋式多模光波导芯片,这种芯片中的上、下两层光波导均通过熔盐离子交换和电场辅助离子迁移形成。对光波导的横截面以及输出光斑进行了观察,并进行了损耗和串扰测试。研究结果表明:双层多模光波导芯片中上、下两层光波导芯部横截面尺寸分别为29μm×19μm和31μm×20μm;两层波导的输出光斑尺寸相互匹配;两层波导传输损耗分别为1.00±0.32 d B/cm和0.78±0.35 d B/cm;两层光波导之间的串扰在17.7d B左右。这种玻璃基片上的双层多模光波导可以使板级光互连的互连密度增大一倍,提高EOCB的性能。展开更多
针对目前国内集成光学技术的现状,对离子交换玻璃基集成光学技术进行了研究,目标是在建立起一个离子交换玻璃基集成光学制作平台,并在此基础上研制出低成本的光通信用光功分器。通过对玻璃基离子交换工艺进行的研究,包括电场辅助离子交...针对目前国内集成光学技术的现状,对离子交换玻璃基集成光学技术进行了研究,目标是在建立起一个离子交换玻璃基集成光学制作平台,并在此基础上研制出低成本的光通信用光功分器。通过对玻璃基离子交换工艺进行的研究,包括电场辅助离子交换、电场辅助退火、K^+离子掩膜工艺等,成功制备了具有低传输损耗和优良偏振相关损耗的掩埋式光波导;通过对基于 Y 分支器的光功分器结构的优化,成功研制了1×4、1×8、1×16、1×32的功分器,器件的主要性能指标已经"达到同类产品的国际水平"。此外,还进行了新型光学器件制作方面的研究。展开更多
基金the Optical Science and Technology Foundation of Shanghai Technology Committee (Grant No. 022261009)the Young Teacher Cultivation Foundation of Dalian University of Technology (Grant No. 893210)the Doctor Startup Foundation of Dalian University of Tech-nology (Grant No. 893322)
文摘A novel method, sputtering K9 glass film, is proposed to solve the surface corrosion of Er-doped phosphate glass during ion-exchange processing for optical waveguide fabrication. The corrosion causes are analyzed to be the intrinsically weak stabilization of phosphate glass structure, hydrophile and weakly acidic property of phosphate radical. Experimental results show that the K9 glass film could not only protect the Er-doped phosphate glass surface from being corroded but also give no influence on the waveguide fabrication. The effect of thickness of K9 glass film on the optical property of waveguide is also investigated and the op- timal thickness is found to be 60―80 nm. It provides a good base for further fabri- cation of active phosphate glass optical waveguide devices.
基金This work was supported by the National Natural Science Foundation of China under Grant No.90201011,10174057.
文摘Transitions of laser diode （LD） pumped Er^3＋-yb^3＋ co-doped glass laser are rather complicated. Considering energy transfer between Er^3＋ and Yb^3＋ ions, cross-relaxation, upconversion luminescence, and other transition processes, rate equations of quasi-three energy-level-system of the Er^3＋-yb^3＋ co-doped laser are presented. The output characteristics are also calculated and analyzed in detail. The results show that Er^3＋-yb^3＋ co-doped phosphate waveguide lasers with high slope efficiency and low threshold can be achieved.
基金This work was supported by the Project, of OpticalScience and Technology of Shanghai (No. 002261002)
文摘Er^3＋-doped Na2O-WO3-TeO2 glass consistent with standard ion-exchange technology has been fabricated and characterized. The measured absorption and emission spectra of the glass were analyzed by the Judd-Ofelt and McCumber theories. The intensity parameters are Ω2 = 7.01×10^-20cm^2, Ω4 = 1.80 × 10^-20 cm^2, Ω6= 1.03 × 10^-20 cm^2. The maximum emission cross-section is 0.91 × 10^-20 cm^2 at 1.533μm, and a broad 1.5μm emission spectrum of 65-nm full width at half-maximum （FWHM） is demonstrated. Glass transition temperature, crystallization onset temperature, density, refractive index are also reported for reference in the design and modelling of the ion-exchange process.
基金Funded by the National Natural Science Foundation of China (No.50672069)Key Item for Basic Research of Shanghai (No.05JC14058)
文摘Ag nanoparticles embedded in soda-lime silicate glass were fabricated by ion-exchange and subsequently annealing method. Effects of annealing duration on the optical nonlinearity and ultrafast dynamics of Ag nanoparticles in glass were investigated by z-scan technique and pump-probe technique. The results indicate that the third-order optical nonlinearity increases with extending the annealing time, the fast decay process with lifetime of a few picoseconds is attributed to thermal equilibrium process of hot electrons and the energy transfer to lattices by interaction with phonons in the formed Ag nanoparticles, while the slow decay in more than one hundred picoseconds corresponds to the subsequent cooling process by a thermal diffusion from the Ag nanoparticle to the host matrix via the phonon-medium interaction. The fast decay process is accelerated with extending the annealing time.
基金The work has been done in the frame of FLAG(Femtosecond Laser Application in Glasses)consortium project with the support of Agence Nationale pour la Recherche(ANR-09-BLAN-0172-01)The authors extend thanks to China Scholarship Council and UniversitéParis-Sud.
文摘To control second harmonic generation (SHG) in silica-based glasses is crucial for fabricating photonic devices, such as frequency doubling waveguides. Here, we investigated SHG of laser induced nonlinear optical crystals in silica-based glasses, according to writing speed and pulse energy. We observed two regions with different probing laser polarization angular dependence: a) a well-defined cosine-like curve with period of 180° at low pulse energy (0.8 μJ) whatever the writing speed or at high pulse energy (1.4 μJ) with high writing speed (25 μm/s). This is accounted for by a well-defined texture for the nano crystals with their polar axis oriented perpendicular to the writing laser polarization;and b) a double cosine-like curve revealing a second texture of the crystals at high pulse energy (1.4 μJ) with low writing speed (5 μm/s) and with the polar axis oriented closer parallel to the writing laser polarization. Therefore, a SHG dependence on probing laser polarization angle may show high contrast by a correct choice of the writing speed and pulse energy. These results pave the way for elaboration of nonlinear optical devices.
基金This work was supported by the Optical Science and Technology Foundation of Shanghai Technology Committee under Grant No. 022261009.
文摘A racetrack waveguide resonator filter was fabricated by ion exchange technology in K9 optical glass. The filter responses of the waveguide resonator were measured with two polarized input lightwaves. The polarization-dependent characteristics of the waveguide resonator were analyzed, and the results of effective indices of nTE=1.5721 and nTM = 1.5548, coupling ratios of rTE = 0.731 and rTM = 0.761, and losses of αTE = 4.35 dB/cm and αTM = 6.05 dB/cm were obtained for transverse electric （TE） and transverse magnetic （TM） modes, respectively. The causes of large loss and effective index differences between TE and TM modes were discussed.
基金This work was financially supported by the National Natural Science Foundation of China(Grant Nos.11405041,51502144 and 61475189).
文摘Ion implantation has played a unique role in the fabrication of optical waveguide devices.Tb'-doped aluminum borosilicate(TDAB)glass has been considered as an important magneto-optical material.In this work,near-infrared waveguides have been manufactured by the(5.5+6.0)MeV C^3+ion implantation with doses of(4.0+8.0)×10^13 ions·cm^-2 in the TDAB glass.The modes propagated in the TDAB glass waveguide were recorded by a prism-coupling system.The finite-difference beam propagation method(FD-BPM)was carried out to simulate the guiding characteristics of the TDAB glass waveguide.The TDAB glass waveguide allows the light propagation with a single-mode at 1.539μm and can serve as a potential candidate for future waveguide isolators.
文摘在光学玻璃基片上制作了双层掩埋式多模光波导芯片,这种芯片中的上、下两层光波导均通过熔盐离子交换和电场辅助离子迁移形成。对光波导的横截面以及输出光斑进行了观察,并进行了损耗和串扰测试。研究结果表明:双层多模光波导芯片中上、下两层光波导芯部横截面尺寸分别为29μm×19μm和31μm×20μm;两层波导的输出光斑尺寸相互匹配;两层波导传输损耗分别为1.00±0.32 d B/cm和0.78±0.35 d B/cm;两层光波导之间的串扰在17.7d B左右。这种玻璃基片上的双层多模光波导可以使板级光互连的互连密度增大一倍,提高EOCB的性能。
文摘针对目前国内集成光学技术的现状,对离子交换玻璃基集成光学技术进行了研究,目标是在建立起一个离子交换玻璃基集成光学制作平台,并在此基础上研制出低成本的光通信用光功分器。通过对玻璃基离子交换工艺进行的研究,包括电场辅助离子交换、电场辅助退火、K^+离子掩膜工艺等,成功制备了具有低传输损耗和优良偏振相关损耗的掩埋式光波导;通过对基于 Y 分支器的光功分器结构的优化,成功研制了1×4、1×8、1×16、1×32的功分器,器件的主要性能指标已经"达到同类产品的国际水平"。此外,还进行了新型光学器件制作方面的研究。
