Zheru Qiu

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Publications associées (36)

Efficient mass manufacturing of high-density, ultra-low-loss Si3N4 photonic integrated circuits

Tobias Kippenberg, Rui Ning Wang, Xinru Ji, Zheru Qiu

Silicon nitride (Si3N4) photonic integrated circuits (PICs) offer significant advantages over traditional silicon photonics, including low loss and superior power handling at optical communication wavelength bands. To facilitate high-density integration an ...

2024

Hybrid integrated multi-lane erbium-doped Si3N4 waveguide amplifiers

Tobias Kippenberg, Xinru Ji, Zheru Qiu

We present the integration of four individual erbium-doped waveguide optical amplifiers on a Si3N4 photonic integrated circuit hybrid integrated with a four-lane semiconductor pump laser diode chip. Each amplifier achieves 15 dB on-chip gain. ...

Optical Society of America2024

Ultrafast Pockels-tunable hybrid integrated E-DBR laser

Tobias Kippenberg, Anat Siddharth, Zheru Qiu

We demonstrate a hybrid integrated frequency-agile laser based on an InP gain chip and an extended electro-optic Bragg waveguide reflector manufactured with a wafer-scale lithium niobate-on-insulator process featuring 10 GHz tuning range with high optical ...

Institute of Electrical and Electronics Engineers Inc.2024

Low-temperature and hydrogen-free silicon dioxide cladding for next-generation integrated photonics

Tobias Kippenberg, Anat Siddharth, Xinru Ji, Zheru Qiu, Zihan Li

We demonstrate a process for hydrogen-free low-loss silicon oxide (SiO2) films deposited using S iCl4 and O 2 as precursors. A wide low-loss window from 1260 nm to 1625 nm is achieved at a deposition temperature of 300 ◦C, essential for next generation pho ...

Optical Society of America2024

Large-Scale Photonic Chip Based Pulse Interleaver for Low-Noise Microwave Generation

Tobias Kippenberg, Rui Ning Wang, Xinru Ji, Zheru Qiu

We demonstrate a 64-times multiplication of a mode-locked laser’s 217 MHz pulse repetition rate to 14 GHz using an integrated Si3N4 interleaver. Six cascaded stages of Mach-Zehnder interferometers with up to 33 cm long optical delay lines are fully integra ...

Springer Science and Business Media Deutschland GmbH2024

Full C-band tunable integrated Erbium lasers via wafer-scale fabrication

Tobias Kippenberg, Rui Ning Wang, Anat Siddharth, Xinru Ji, Zheru Qiu

We demonstrate an integrated Erbium-based tunable laser using wafer-scale fabrication and ion implantation of silicon nitride photonic integrated circuits, and achieve single-frequency lasing tunable from 1530 nm to 1575 nm covering the entire optical C-ba ...

Institute of Electrical and Electronics Engineers Inc.2024

Hertz-linewidth, high-power, frequency-agile photonic integrated E-DBR laser

Tobias Kippenberg, Anat Siddharth, Zheru Qiu

We demonstrate hybrid integration of an RSOA with an extended-distributed Bragg reflector (E-DBR) laser cavity implemented on a Si3N4 chip with monolithically integrated piezoactuators. The laser exhibits intrinsic linewidth of 4 Hz with laser frequency tu ...

Optical Society of America2024

Probing the Formation of Nonlinear Optical States with Free Electrons

Tobias Kippenberg, Rui Ning Wang, Aleksandr Tusnin, Zheru Qiu, Yujia Yang, Arslan Sajid Raja, Guanhao Huang, Alexey Tikan

Combining nonlinear integrated photonics with electron microscopy, we probe the formation of optical dissipative structures in Si3N4 microresonators with free electrons and find unique spectral fingerprints in the electron spectrum that enable new electron ...

Institute of Electrical and Electronics Engineers Inc.2024

Ultrafast Tunable Photonic Integrated E-DBR Pockels Laser

Tobias Kippenberg, Anat Siddharth, Zheru Qiu

The hybrid integration of III-V gain media with low-loss photonic integrated circuits has advanced the performance of laser systems in terms of laser stability and coherence. The advent of lithium niobate on insulator (LNOI) photonics for self-injection lo ...

Springer Science and Business Media Deutschland GmbH2024

Coupling Free Electrons and Cavity Photons in a Transmission Electron Microscope

Tobias Kippenberg, Rui Ning Wang, Zheru Qiu, Yujia Yang, Junqiu Liu, Arslan Sajid Raja, Guanhao Huang

We couple free electrons to the optical modes of a photonic microring resonator. Inelastic electron scattering leads to the generation of cavity photons, correlated to the electrons in time and energy loss. ...

Institute of Electrical and Electronics Engineers Inc.2024

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