High-finesse cavity external optical feedback DFB laser with hertz relative linewidth

Zhao, Yang; Wang, Qiang; Meng, Fanqi; Lin, Yang‐I; Wang, Shaokai; Li, Ye; Lin, Baike; Cao, Shiying; Cao, Jianping; Fang, Zhongyuan; Li, Tianchu; Zang, Erjun

doi:10.1364/ol.37.004729

Cited by 34 publications

(19 citation statements)

References 14 publications

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“…We analyzed its spectral stability and compared it to the stability of similar systems described in the literature ( Table 1). The laser with resonant optical feedback from a macroscopic ultra-high-Q ULE-cavity [14] provides the narrowest Lorentzian (intrinsic) and FWHM linewidth. We emphasize however that the Q-factor of the external cavity is not the only critical factor determining the laser spectrum.…”

Section: Discussionmentioning

confidence: 99%

“…We attribute this fact to the high feedback level realized in the present setup due to the AR-coating of the laser facet. In contrast to the ULE laser [14], the laser presented in this paper can be assembled on a footprint 1 × 5 cm 2 (diode, coupling lenses and external cavity). Last, with the present setup we provide more than 50 mW optical output power.…”

Section: Discussionmentioning

confidence: 99%

“…The choice of relatively moderate finesse together with confocal geometry greatly simplifies the coupling of light into the cavity and makes it insensitive to mechanically or thermally induced misalignments. The simplicity and small size of the confocal cavity also allows assembling our laser module much more compact than the setup presented in [14]. Nevertheless, we were able to maintain high reduction of the laser frequency noise.…”

Section: Introductionmentioning

confidence: 95%

“…Two implementations of this concept have been demonstrated so far. The first is based on a whispering gallery-mode (WGM) micro-ring resonator [13] and the other on a macroscopic high-Q, ultra-low expansion (ULE) cavity [14].…”

Section: Introductionmentioning

confidence: 99%

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Ultra-narrow linewidth DFB-laser with optical feedback from a monolithic confocal Fabry-Perot cavity

Lewoczko‐Adamczyk¹,

Pyrlik²,

Häger³

et al. 2015

Opt. Express

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We present a compact, ultra-narrow-linewidth semiconductor laser based on a 780 nm distributed feedback diode laser optically self-locked to a mode of an external monolithic confocal Fabry-Perot resonator. We characterize spectral properties of the laser by measuring its frequency noise power spectral density. The white frequency noise levels at 5 Hz(2)/Hz above a Fourier frequency as small as 20 kHz. This noise level is more than five orders of magnitude smaller than the noise level of the same solitary diode laser without resonant optical feedback, and it is three orders of magnitude smaller than the noise level of a narrow linewidth, grating-based, extended-cavity diode laser. The corresponding Lorentzian linewidth of the laser with resonant optical feedback is 15.7 Hz at an output power exceeding 50 mW.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Ultra-narrow linewidth DFB-laser with optical feedback from a monolithic confocal Fabry-Perot cavity

Lewoczko‐Adamczyk¹,

Pyrlik²,

Häger³

et al. 2015

Opt. Express

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“…2.1 shows the very nice package the laser came in, including both a TEC and thermistor for good thermal control of the laser diode. Care must be taken with these lasers, as they are incredibly sensitive to feedback, even allowing for dramatic linewidth reduction given the correct optical feedback [49]. In fact, when installing this laser into the 461nm SHG system, additional optical isolation was necessary to allow stable operation.…”

Section: The Old Blue Laser Systemmentioning

confidence: 99%

Building a better atomic clock

Bloom¹

2013

Phys. Today

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DateThe final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. this work documents the first optical lattice clock to best all other atomic clock implementations, a mere 8 years after the first proof of principle experiments. In this thesis I will describe how we have overcome a number of important systematic uncertainties to achieve these results. This revolution in accuracy and precision opens the door for new experiments utilizing the clock as a probe of quantum many-body physics. To this end, a new apparatus has been designed that combines the unprecedented precision of clock experiments with the amazing progress attained in quantum gas experiments. DedicationTo my family, both old and new.

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Silicon Nitride Integrated Photonics from Visible to Mid‐Infrared Spectra

Buzaverov,

Baburin,

Sergeev

et al. 2024

Laser & Photonics Reviews

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Silicon nitride (Si3N4) photonic integrated circuits (PICs) are of great interest due to their extremely low propagation loss and higher integration capabilities. The number of applications based on the silicon nitride integrated photonics platform continues to grow, including the Internet of Things (IoT), artificial intelligence (AI), light detection and ranging (LiDAR), hybrid neuromorphic and quantum computing. It's potential for CMOS compatibility, as well as advances in heterogeneous integration with silicon‐on‐insulator, indium phosphate, and lithium niobate on insulator platforms, are leading to an advanced hybrid large‐scale PICs. Here, they review key trends in Si3N4 photonic integrated circuit technology and fill an information gap in the field of state‐of‐the‐art devices operating from the visible to the mid‐infrared spectrum. A comprehensive overview of its microfabrication process details (deposition, lithography, etching, etc.) is introduced. Finally, the limitations and challenges of silicon nitride photonics performance are pointed out in an ultra‐wideband, providing routes and prospects for its future scaling and optimization.

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High-finesse cavity external optical feedback DFB laser with hertz relative linewidth

Cited by 34 publications

References 14 publications

Ultra-narrow linewidth DFB-laser with optical feedback from a monolithic confocal Fabry-Perot cavity

Ultra-narrow linewidth DFB-laser with optical feedback from a monolithic confocal Fabry-Perot cavity

Building a better atomic clock

Silicon Nitride Integrated Photonics from Visible to Mid‐Infrared Spectra

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