2:15pm - 2:45pmInvitedID: 490
/ TOM6 S1: 1
TOM 6 Optical Materials
Invited - Broadband Kerr comb generation using Lithium niobate on insulator microresonator
Zhenda Xie, Zexing Zhao, Chenyu Wang, Kunpeng Jia, Xiaohui Tian, Shi-Ning Zhu
Nanjing University, China
Optical frequency comb based on microresonator (microcomb) is an integrated coherent light source
thanks to its high integrity, low power consumption, and low phase noise. Especially, octave spanning
microcombs via dispersion engineering can realize a chip-scale 2f-3f or f-2f self-referencing scheme and
has the potential to promise a high-precision frequency standard. In practice, the stability of the soliton
comb source is the basis of subsequent signal processing. However, achieving a long-term stable soliton
comb can be challenging due to thermal effects or center frequency jitter induced by the pump. This often
requires a complex feedback system, which hinders the minimization of the device.
2:45pm - 3:00pmID: 414
/ TOM6 S1: 2
TOM 6 Optical Materials
Wafer-scale domain reversal of thin-film lithium niobate
Mengwen Chen, Chenyu Wang, Xiao-Hui Tian, Kunpeng Jia, Hua-Ying Liu, Shi-Ning Zhu, Zhenda Xie
National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering, School of Physics, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
Domain reversal engineering stands out as an essential procedure for realizing effective nonlinear conversion on periodically poled lithium niobate on insulator (PPLNOI), laying a promising foundation for nonlinear photonic integrated circuits (PICs). However, the domain reversal for thin-film lithium niobate has been confined to the chip scale, hindering its use in extensive nonlinear photonic systems. Here, we present a wafer-scale periodic poling platform on a 4-inch LNOI wafer, covering reversal lengths from 0.5 to 10.17mm and periods ranging from 4.38 to 5.51 μm with high fidelity. The efficient poling is enabled by a single operation over ~1 cm^2 area, using strategically grouped electrode pads and adjustable comb line widths. We achieved a 100% success rate and a 98% high-quality rate on average, showcasing high throughput, stability and scalability, making it more economically viable than chiplet-level poling. Our research holds immense potential to significantly enhance ultra-high performance for applications in optical communications, photonic neural networks, and quantum photonics.
3:00pm - 3:15pmID: 229
/ TOM6 S1: 3
TOM 6 Optical Materials
Generation of Structured NIR Dual-Optical Parametric Oscillators and Yellow-Orange Lasers from chi(2) Nonlinear Mode Converter
KaiHsun Chang1,2, JieHua Lai1, BaiWei Wu1, ToFan Pan1, MingShun Tsai1, HungHsiang Chiu3, ChiaChun Fan1, Safia Mohand Ousaid2, Azzedine Boudrioua2, Hiroyuki Yokoyama4, Eiji Higurashi4, Hidefumi Akiyama5, ChihMing Lai6, LungHan Peng1,3
1Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106, Taiwan, R.O.C.; 2Laboratoire de Physique de Lasers CNRS UMR 7538, Université Sorbonne Paris Nord, Villetaneuse 93430, France; 3Dept. Elec. Eng. National Taiwan University, Taipei 106, Taiwan, R.O.C.; 4Graduate school of engineering, Tohoku University, Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan; 5The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan; 6Electronic and optoelectronic system research laboratories, Industrial Technology Research Institute, Hsinchu, 310401, Taiwan
We reported structured NIR dual-optical parametric oscillators (OPOs) and tri-wavelengths yellow-orange beams from a monolithic periodically poled lithium tantalate. The structured dual-OPOs comprise of dual-signal wavelength at 980 and 964 nm, which are residing on the opposite sides of TEM10 cavity mode. By introducing additional up-conversion processes, a structured tri-wavelength yellow-orange TEM20 cavity mode can be observed. We consider a numerical model by including a Laplacian operator in the transverse plane to simulate the distribution of dual OPO. Our calculation indicates that the structured mode was attributed to the transversally inhomogeneous nonlinear optical gain.
3:15pm - 3:30pmID: 365
/ TOM6 S1: 4
TOM 6 Optical Materials
Periodically-poled lithium tantalate ridge waveguides for efficient nonlinear frequency conversion in the near UV
Sergiy Suntsov, Chaitanya Sharma, Sarah Kretschmann, Kore Hasse, Detlef Kip
Helmut Schmidt University, Germany
Optical damage resistant ridge waveguides for blue and near UV wavelengths have been fabricated using high-temperature Zr and Zn diffusion doping and vapor transport equilibration (VTE) of congruent LiTaO3 crystals. For both dopants high optical damage thresholds >10 MW/cm2 for 532 nm light were demonstrated at room temperature, which can be increased by a factor ~3 when heating the samples to ~150°C. Ridge waveguides with low optical losses of ~0.4 dB/cm were fabricated using diamond-blade dicing. First-order periodic poling with grating periods of ~3 um can be used for efficient nonlinear frequency conversion for both SHG (800 nm pump) or SPDC (400 nm pump) processes.
3:30pm - 3:45pmID: 155
/ TOM6 S1: 5
TOM 6 Optical Materials
Epitaxial LiNbO3 growth and layer transfer for thin-film electro-optic modulator realization
Grégoire Larger1,2, Jérôme Hauden1, Aurore Ecarnot1, Anne-Laure Pointel1, Vincent Astié3, Ausrine Bartasyte2,4
1exail, France; 2Département Temps-Fréquence, FEMTO-ST, Besançon, France; 3Annealsys, Montpellier, France; 4Institut Universitaire de France
The aim of the PhD project is to develop a new trend in modulation system for Exail company: thin film (<1 µm) lithium niobate (LN) electro-optic modulator. It exhibits better performance in term of bandwidth, power consumption and footprint than legacy ones [1-3]. This PhD is a cooperation between Exail photonics which is world-renowned for the performances of their electro-optic modulators and FEMTO-ST institute which can offer the possibility to grow stoichiometric LN thin film by means of direct liquid injection metalorganic chemical vapor deposition (DLI-MOCVD). This cooperation opens the possibility to obtain industrialization of optical device based on CVD LN stoichiometric layers which allow to have enhanced performances such as higher electro-optic coefficient than that of congruent compositions of commercial single crystals. Thus, all steps from MOCVD layer deposition to modulator realization can be done here in Besançon
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