Yiran Zhu1, Yuan Zhou2、3, Zhe Wang2、3、4, Zhiwei Fang1、*, Zhaoxiang Liu1、**, Wei Chen1, Min Wang1, Haisu Zhang1, and Ya Cheng1、2、5、6、7、***
Author Affiliations
1The Extreme Optoelectromechanics Laboratory (XXL), School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China2State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China3Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China4School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China5State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China6Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China7Shanghai Research Center for Quantum Sciences, Shanghai 201315, Chinashow less
DOI: 10.3788/COL202220.011303
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Yiran Zhu, Yuan Zhou, Zhe Wang, Zhiwei Fang, Zhaoxiang Liu, Wei Chen, Min Wang, Haisu Zhang, Ya Cheng. Electro-optically tunable microdisk laser on Er3+-doped lithium niobate thin film[J]. Chinese Optics Letters, 2022, 20(1): 011303
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Fig. 1. (a) Schematic of the on-chip Er3+-doped LN microdisk resonator integrated with Cr film electrodes. (b) The top view of the 200-µm-diameter Er3+-doped LN microdisk from the optical microscope. (c) The enlarged image of the rim of the Er3+-doped LN microdisk by a 100× microscope objective.
Fig. 2. (a) Schematic of the experimental setup for tunable Er3+-doped LN microdisk laser. (WG, waveform generator; CTL, C-band tunable laser; PL, pump laser; PC, polarization controller; PD, photodetector; Osc, oscilloscope; OSA, optical spectrum analyzer; VG, voltage generator; OF, optical fiber; EC, electric cable.) (b) The measured transmission spectrum for the wavelength of the Er3+-doped LN microdisk laser. (c) The experimental setup photographed by a cell phone.
Fig. 3. (a) Histogram showing the statistic results of 80 resonant modes in Er3+-doped LN microdisk. (b) The double Lorentzian fitting showing a mode splitting, indicating both intrinsic Q factors of 2.13 × 106 as measured at λ = 1544 nm.
Fig. 4. Electro-optic modulation in Er3+-doped LN microdisk resonator. (a) Normalized transmission measured when −200 V, −150 V, −100 V, −50 V, 0 V, +50 V, +100 V, +150 V, and +200 V voltages were applied on the electrodes. (b) The linear fitting of resonance wavelength shift in the Er3+-doped LN microdisk resonator with the applied negative and positive voltages.
Fig. 5. (a) Spectrum of the Er3+-doped LN microdisk laser with the pump power at 18 mW. (b) Recorded lasing spectra of the microdisk with the increasing voltage applied on electrodes.