Ultra-narrow linewidth hybrid integrated semiconductor laser

Abstract

We demonstrate a hybrid integrated and widely tunable diode laser with an intrinsic linewidth as narrow as 40 Hz, achieved with a single roundtrip through a low-loss feedback circuit that extends the cavity length to 0.5 meter on a chip. Employing solely dielectrics for single-roundtrip, single-mode resolved feedback filtering enables linewidth narrowing with increasing laser power, without limitations through nonlinear loss. We achieve single-frequency oscillation with up to 23 mW fiber coupled output power, 70-nm wide spectral coverage in the 1.55 $\mu$m wavelength range with 3 mW output, and obtain more than 60 dB side mode suppression. Such properties and options for further linewidth narrowing render the approach of high interest for direct integration in photonic circuits serving microwave photonics, coherent communications, sensing and metrology with highest resolution.

13 pages, and 11 figures

References in corpus (9)

• All-optical signal processing platforms for CMOS compatible integrated nonlinear optics
• Fully integrated ultra-low power Kerr comb generation
• Detecting single viruses and nanoparticles using whispering gallery microlasers
• Making optical atomic clocks more stable with $10^{-16}$ level laser stabilization
• Sub-Hz Linewidth Photonic-Integrated Brillouin Laser
• Integrated Waveguide Brillouin Laser
• Electrically pumped photonic integrated soliton microcomb
• Hybrid integrated semiconductor lasers with silicon nitride feedback circuits
• 25 kHz narrow spectral bandwidth of a wavelength tunable diode laser with a short waveguide-based external cavity

Cited by in corpus (19)

• Hertz-linewidth semiconductor lasers using CMOS-ready ultra-high-$Q$ microresonators
• High-performance lasers for fully integrated silicon nitride photonics
• Integrated Pockels Laser
• Recent Advances in Laser Self-Injection Locking to High-$Q$ Microresonators
• Fully on-chip photonic turnkey quantum source for entangled qubit/qudit state generation
• Photonic integrated beam delivery in a rubidium 3D magneto-optical trap
• Silicon nitride stress-optic microresonator modulator for optical control applications
• Piezoelectric actuation for integrated photonics
• Sub-kHz-linewidth external-cavity laser (ECL) with Si${}_3$N${}_4$ resonator used as a tunable pump for a Kerr frequency comb
• Hybrid integrated mode-locked laser diodes with a silicon nitride extended cavity
• Widely-tunable and narrow-linewidth hybrid-integrated diode laser at 637 nm
• Photonic circuits for laser stabilization with ultra-low-loss and nonlinear resonators
• Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser
• High-purity microwave generation using a dual-frequency hybrid integrated semiconductor-dielectric waveguide laser
• Long-term absolute frequency stabilization of a hybrid-integrated InP-Si3N4 diode laser
• Hybrid integrated near UV lasers using the deep-UV Al2O3 platform
• A hybrid-integrated diode laser in the visible spectral range
• Integrated diode lasers for the generation of sub-GHz repetition rate frequency combs
• Ultralight Dark Matter from the Edge of Field Space