Application of a self-injection locked cyan laser for Barium ion cooling and spectroscopy

Savchenkov, Anatoliy A.; Christensen, Justin; Hucul, David; Campbell, W. C.; Hudson, Eric R.; Williams, Skip; Matsko, Andrey B.

doi:10.1038/s41598-020-73373-w

Cited by 13 publications

(4 citation statements)

References 22 publications

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“…Recent studies have demonstrated the feasibility of using high-optical WGM microresonators for passive stabilization of single-frequency [20,21,[63][64][65][66][67] or even multi-frequency [68][69][70][71][72][73][74][75] semiconductor lasers to sub-kilohertz linewidth in different spectral ranges. Some of the lasers became commercial products [76].…”

Section: Q Qmentioning

confidence: 99%

“…A number of main directions can be distinguished in the area. A gallium nitride (GaN) semiconductor FP laser diode operating at a wavelength of 446.5 nm with a linewidth of less than 1 MHz has been demonstrated [69] as well as the sub-100-kHz UV laser at 370 nm [72]. It is worth noting that there were crystalline MgF microresonators with factors exceeding .…”

Section: Q Qmentioning

confidence: 99%

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Recent advances in laser self-injection locking to high-Q microresonators

et al. 2023

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The stabilization and manipulation of laser frequency by means of an external cavity are nearly ubiquitously used in fundamental research and laser applications. While most of the laser light transmits through the cavity, in the presence of some back-scattered light from the cavity to the laser, the self-injection locking effect can take place, which locks the laser emission frequency to the cavity mode of similar frequency. The self-injection locking leads to dramatic reduction of laser linewidth and noise. Using this approach, a common semiconductor laser locked to an ultrahigh-Q microresonator can obtain sub-Hertz linewidth, on par with state-of-the-art fiber lasers. Therefore it paves the way to manufacture high-performance semiconductor lasers with reduced footprint and cost. Moreover, with high laser power, the optical nonlinearity of the microresonator drastically changes the laser dynamics, offering routes for simultaneous pulse and frequency comb generation in the same microresonator. Particularly, integrated photonics technology, enabling components fabricated via semiconductor CMOS process, has brought increasing and extending interest to laser manufacturing using this method. In this article, we present a comprehensive tutorial on analytical and numerical methods of laser self-injection locking, as well a review of most recent theoretical and experimental achievements.

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Section: Q Qmentioning

confidence: 99%

Section: Q Qmentioning

confidence: 99%

Recent advances in laser self-injection locking to high-Q microresonators

et al. 2023

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“…However, in the absence of an external cavity, a laser diode would be required for spectroscopy due to its narrow spectral emission. Laser cooling, which also requires precise control over the emission spectrum, might also make use of external cavities and injection locking [69][70][71][72].…”

Section: Instrumentation: Industry and Researchmentioning

confidence: 99%

Visible‐Light Laser Diodes and Superluminescent Diodes: Characteristics and Applications

Alkhazragi

Holguín‐Lerma

et al. 2021

Digital Encyclopedia of Applied Physics

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Semiconductor light sources technology has seen tremendous strides in recent decades and a rapidly increasing interest in it. The unique advantages and characteristics of this form of light generation include compactness, high efficiency, and reliability. With these recent advancements, light-emitting diodes (LEDs), laser diodes, and superluminescent diodes (SLDs) have become an indispensable part of our homes, factories, and research facilities. In particular, the sensitivity of the human eye to the visible range of the electromagnetic spectrum ranging from 400 to 700 nm and the wavelength-dependence of optical characteristics of materials make visible light required for a plethora of applications ranging from displays for entertainment, to imaging in the medical field, to light-based atomic clocks. While LEDs are the most commonly found type of semiconductor light sources, laser diodes and SLDs are of special interest due to their higher output optical power, spectral purity, and coherence. In this tutorial, we first go over the main unique characteristics of the different types and configurations of visible-light laser diodes and SLDs and their general structures with a focus on their advantages compared to LEDs. We then discuss the applications in which these characteristics are of great interest in the fields of displays, communication, instrumentation, and photonic integrated circuits.

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“…In addition to quantum noise, thermodynamical noise, such as thermo-refractive noise due to refractive index fluctuations, constitutes another limit 17 , 18 . To date, the lowest laser phase noise of compact semiconductor lasers is achieved by self-injection locking with discrete crystalline resonators (sub-Hz white frequency noise level) 19 , 20 , and extensively to silicon-based lasers 21 , 22 . Using Si 3 N 4 TriPleX waveguides 23 , 24 as first demonstrated by the pioneering work of the group of K.J.…”

Section: Introductionmentioning

confidence: 99%

Low-noise frequency-agile photonic integrated lasers for coherent ranging

et al. 2022

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Frequency modulated continuous wave laser ranging (FMCW LiDAR) enables distance mapping with simultaneous position and velocity information, is immune to stray light, can achieve long range, operate in the eye-safe region of 1550 nm and achieve high sensitivity. Despite its advantages, it is compounded by the simultaneous requirement of both narrow linewidth low noise lasers that can be precisely chirped. While integrated silicon-based lasers, compatible with wafer scale manufacturing in large volumes at low cost, have experienced major advances and are now employed on a commercial scale in data centers, and impressive progress has led to integrated lasers with (ultra) narrow sub-100 Hz-level intrinsic linewidth based on optical feedback from photonic circuits, these lasers presently lack fast nonthermal tuning, i.e. frequency agility as required for coherent ranging. Here, we demonstrate a hybrid photonic integrated laser that exhibits very narrow intrinsic linewidth of 25 Hz while offering linear, hysteresis-free, and mode-hop-free-tuning beyond 1 GHz with up to megahertz actuation bandwidth constituting 1.6 × 1015 Hz/s tuning speed. Our approach uses foundry-based technologies - ultralow-loss (1 dB/m) Si3N4 photonic microresonators, combined with aluminium nitride (AlN) or lead zirconium titanate (PZT) microelectromechanical systems (MEMS) based stress-optic actuation. Electrically driven low-phase-noise lasing is attained by self-injection locking of an Indium Phosphide (InP) laser chip and only limited by fundamental thermo-refractive noise at mid-range offsets. By utilizing difference-drive and apodization of the photonic chip to suppress mechanical vibrations of the chip, a flat actuation response up to 10 MHz is achieved. We leverage this capability to demonstrate a compact coherent LiDAR engine that can generate up to 800 kHz FMCW triangular optical chirp signals, requiring neither any active linearization nor predistortion compensation, and perform a 10 m optical ranging experiment, with a resolution of 12.5 cm. Our results constitute a photonic integrated laser system for scenarios where high compactness, fast frequency actuation, and high spectral purity are required.

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Application of a self-injection locked cyan laser for Barium ion cooling and spectroscopy

Cited by 13 publications

References 22 publications

Recent advances in laser self-injection locking to high-Q microresonators

Recent advances in laser self-injection locking to high-Q microresonators

Visible‐Light Laser Diodes and Superluminescent Diodes: Characteristics and Applications

Low-noise frequency-agile photonic integrated lasers for coherent ranging

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