Tunable external-cavity semiconductor laser using monolithically integrated tapered amplifier and grating coupler for collimation

Uemukai, Masahiro; Suhara, Toshiaki; Yutani, K.; Shimada, N.; Fukumoto, Yukio; Nishihara, Hiroshi; Larsson, Anders

doi:10.1109/68.896322

Cited by 6 publications

(1 citation statement)

References 10 publications

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“…Following this strategy, we design a gain-driven polariton (GDP) system [21] and demonstrate the meter-scale strong coupling between microwave photons in an active cavity and magnons in a ferrimagnetic crystal. The active cavity is fully described by the Van der Pol mechanism [22][23][24], which widely exists in nearly all self-sustained systems, such as heartbeats [25], semiconductor lasers [26] and trapped ions [27]. The core mechanism is a saturable gain that adaptively compensates for the system damping, thus making the system self-sustained.…”

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confidence: 99%

Strong photon-magnon interaction beyond the near field

Rao¹,

Wang²,

Yao³

et al. 2023

Preprint

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Achieving strong interactions between distinct systems over macroscopic distances is important for constructing quantum or neural networks, but in conventional wisdom strong coupling is routinely achieved in close proximity. Recently, cascaded strong coupling under laser mediation breaks this scenario, but directly forming long-range strong coupling through radiation channels remains challenging because of the severe decay of the interaction with spatial distance. In light of the emerging gain-driven polartion, here we show that this paradigm can be breached if the system damping is compensated by a gain. Consequently, a meter-scale-strong photon-magnon coupling at room temperature is experimentally realized. With full access to traveling waves, we remotely control photon-magnon coupling by modulating the phases and amplitudes of traveling waves, rather than reconfiguring subsystems themselves following conventional wisdom. Our method for realizing one-meter range strong interactions in cavity magnonics may provide a general idea for other physical entities. The experimental achievements in our work may promote the construction of information networks based on cavity magnonics.

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mentioning

confidence: 99%

Strong photon-magnon interaction beyond the near field

Rao¹,

Wang²,

Yao³

et al. 2023

Preprint

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Integrated photonic devices using semiconductor quantum-well structures

Suhara

Uemukai

2007

Nano Biophotonics - Science and Technology, Proceedings of the 3rd International Nanophotonics Symposium Handai

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External-cavity tunable mid-infrared laser using off-band surface-emitting Bragg grating coupler

Zhang

Peng

Seetharaman

et al. 2005

Applied Physics Letters

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An external-cavity laser using an integrated two-segment design allows broad and continuous wavelength tuning with independent control of power and wavelength. The laser has a gain segment and a surface-emitting Bragg grating segment that was designed to be off-band for zero reflection inside the cavity, and with a strong free-space coupling to an external mirror to form a linear cavity. Wavelength control was achieved with a combination of coarse and broad wavelength tuning (140nm) with the external mirror, and continuous, fine wavelength tuning via current-induced phase shift in the Bragg grating. Separate controls of the two segments allowed wavelength fine tuning without power variation and vice versa. The concept was applied to a 7μm laser, and is applicable to other wavelength.

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Tunable external-cavity semiconductor laser using monolithically integrated tapered amplifier and grating coupler for collimation

Cited by 6 publications

References 10 publications

Strong photon-magnon interaction beyond the near field

Strong photon-magnon interaction beyond the near field

Integrated photonic devices using semiconductor quantum-well structures

External-cavity tunable mid-infrared laser using off-band surface-emitting Bragg grating coupler

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