High-power and narrow-linewidth laser on thin-film lithium niobate enabled by photonic wire bonding
arXiv:2407.00269 · doi:10.1063/5.0231827
Abstract
Thin-film lithium niobate (TFLN) has emerged as a promising platform for the realization of high performance chip-scale optical systems, spanning a range of applications from optical communications to microwave photonics. Such applications rely on the integration of multiple components onto a single platform. However, while many of these components have already been demonstrated on the TFLN platform, to date, a major bottleneck of the platform is the existence of a tunable, high-power, and narrow-linewidth on-chip laser. Here, we address this problem using photonic wire bonding to integrate optical amplifiers with a thin-film lithium niobate feedback circuit, and demonstrate an extended cavity diode laser yielding high on-chip power of 78 mW, side mode suppression larger than 60 dB and wide wavelength tunability over 43 nm. The laser frequency stability over short timescales shows an ultra-narrow intrinsic linewidth of 550 Hz. Long-term recordings indicate a high passive stability of the photonic wire bonded laser with 58 hours of mode-hop-free operation, with a trend in the frequency drift of only 4.4 MHz/h. This work verifies photonic wire bonding as a viable integration solution for high performance on-chip lasers, opening the path to system level upscaling and Watt-level output powers.
10 pages, 4 figures; updated long-term stability measurements with new and improved data
References in corpus (12)
- Monolithic Ultrahigh-Q Lithium Niobate Microring Resonator
- High-performance Coherent Optical Modulators based on Thin-film Lithium Niobate Platform
- Integrated Electro-Optic Isolator on Thin Film Lithium Niobate
- Low-loss fiber-to-chip interface for lithium niobate photonic integrated circuits
- Integrated Pockels Laser
- Reduced Material Loss in Thin-film Lithium Niobate Waveguides
- Hybrid integrated semiconductor lasers with silicon nitride feedback circuits
- Ring resonator enhanced mode-hop-free wavelength tuning of an integrated extended-cavity laser
- Octave-spanning Kerr soliton frequency combs in dispersion- and dissipation-engineered lithium niobate microresonators
- Electrically driven compact hybrid lithium niobate microring laser
- Widely-tunable and narrow-linewidth hybrid-integrated diode laser at 637 nm
- Long-term absolute frequency stabilization of a hybrid-integrated InP-Si3N4 diode laser