Titanium:Sapphire-on-insulator for broadband tunable lasers and
high-power amplifiers on chip
- URL: http://arxiv.org/abs/2312.00256v1
- Date: Fri, 1 Dec 2023 00:07:38 GMT
- Title: Titanium:Sapphire-on-insulator for broadband tunable lasers and
high-power amplifiers on chip
- Authors: Joshua Yang, Kasper Van Gasse, Daniil M. Lukin, Melissa A. Guidry,
Geun Ho Ahn, Alexander D. White, Jelena Vu\v{c}kovi\'c
- Abstract summary: Ti:Sa lasers are unmatched in bandwidth and tuning range, yet their use is severely restricted due to their large size, cost, and need for high optical pump powers.
Here, we demonstrate a monocrystalline Ti:Sa-on-insulator (Ti:SaOI) photonics platform which enables dramatic miniaturization, cost-reduction, and scalability of Ti:Sa technology.
- Score: 37.69303106863453
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Titanium:Sapphire (Ti:Sa) lasers have been essential for advancing
fundamental research and technological applications. Ti:Sa lasers are unmatched
in bandwidth and tuning range, yet their use is severely restricted due to
their large size, cost, and need for high optical pump powers. Here, we
demonstrate a monocrystalline Ti:Sa-on-insulator (Ti:SaOI) photonics platform
which enables dramatic miniaturization, cost-reduction, and scalability of
Ti:Sa technology. First, through fabrication of low-loss whispering gallery
mode resonators, we realize a Ti:Sa laser operating with an ultra-low lasing
threshold of 290 $\mu$W. Then, through orders-of-magnitude improvement in mode
confinement in Ti:SaOI waveguides, we realize the first integrated solid-state
(i.e., non-semiconductor) optical amplifier operating below 1 $\mu$m, with an
ultra-wide bandwidth of 700 - 950 nm and peak gain of 64 dB/cm. We demonstrate
unprecedented 17 dB distortion-free amplification of picosecond pulses to up to
2.3 nJ pulse energy, corresponding to a peak power of 1.0 kW. Finally, we
demonstrate the first tunable integrated Ti:Sa laser, featuring narrow
linewidths and a 24.7 THz tuning range, which, for the first time, can be
pumped with low-cost, miniature, off-the-shelf green laser diodes. This opens
doors to new modalities of Ti:Sa lasers (now occupying a footprint less than
0.15 mm$^2$), such as massively-scalable Ti:Sa laser array systems for a
variety of applications. As a proof-of-concept demonstration, we employ a
Ti:SaOI laser array as the sole optical control for a cavity quantum
electrodynamics experiment with artificial atoms in silicon carbide. This work
is a key step towards the democratization of Ti:Sa technology through a three
orders-of-magnitude reduction in cost and footprint, as well as the
introduction of solid-state broadband amplification of sub-micron wavelength
light.
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