Results 41 to 50 of about 5,269,631 (254)

Optical pump assisted broadband terahertz frequency comb

AIP Advances, 2021
A broadband terahertz (THz) frequency comb assisted by an optical pump in THz quantum cascade lasers (QCLs) is investigated theoretically and numerically through a Maxwell–Bloch model combined with the coupled wave theory.
Kai Wang, Ning Yang, Peng Bai, Weidong Chu, Yuanyuan Li, Jian Wang   +5 more
doaj   +1 more source

Controllable Kerr and Raman-Kerr frequency combs in functionalized microsphere resonators

Nanophotonics, 2019
Optical frequency comb (OFC) based on the whispering-gallery-mode microresonator has various potential applications in fundamental and applied areas. Once the solid microresonator is fabricated, its structure parameters are generally unchanged. Therefore,
Zhu Song, Shi Lei, Ren Linhao, Zhao Yanjing, Jiang Bo, Xiao Bowen, Zhang Xinliang   +6 more
doaj   +1 more source

Towards generation of optical frequency comb in the short-wavelength visible region using periodically poled lithium niobate waveguides

Results in Optics, 2021
We demonstrate the spectral broadening of an octave-spanning erbium-based frequency comb in two types of periodically poled lithium niobate (PPLN) waveguides.
Yuma Goji, Chaoyun Chen, Kohei Ikeda, Kazumichi Yoshii, Feng-Lei Hong   +4 more
doaj   +1 more source

Spectral line-by-line pulse shaping of on-chip microresonator frequency combs [PDF]

, 2011
Recently, on-chip comb generation methods based on nonlinear optical modulation in ultrahigh-quality-factor monolithic microresonators have been demonstrated, where two pump photons are transformed into sideband photons in a four-wave-mixing process ...
Lei Chen, Wang, Jian, Daniel E. Leaird, Andrew M. Weiner, Miao, Houxun, Chen, Lei, Ferdous, Fahmida, Leaird, Daniel E., Srinivasan, Kartik, Kartik Srinivasan, Varghese, Leo Tom, Leo Tom Varghese, Houxun Miao, Jian Wang, Fahmida Ferdous, Weiner, Andrew M.   +15 more
core   +1 more source

Low-noise Yb:CALGO optical frequency comb [PDF]

, 2021
We report on a compact optical frequency comb, operating in the wavelength range from 670 to 1500 nm, based on diode-pumped low-noise femtosecond Yb:CALGO amplified laser system.
Vicentini E., Galzerano G., Molteni L. M., Betz M., Laporta P., Canella F., Coluccelli N., Piccinno G., Agnesi A., Pirzio F., Piccinno, Giuliano, Coluccelli, Nicola, Laporta, Paolo, Molteni, Lisa M., Pirzio, Federico, Galzerano, Gianluca, Vicentini, Edoardo, Canella, Francesco, Agnesi, Antoniangelo, Betz, Markus, Gianluca Galzerano, Nicola Coluccelli, Markus Betz, Federico Pirzio, Paolo Laporta, Francesco Canella, Giuliano Piccinno, Edoardo Vicentini, Antoniangelo Agnesi, Lisa M. Molteni   +29 more
core   +1 more source

Control of Frequency Combs with Passive Resonators

Sensors, 2023
Tailored optical frequency combs are generated by nesting passive etalons within mode-locked oscillators. In this work, the oscillator generates a comb of 6.8 GHz with 106 MHz side-bands.
James Hendrie, Ning Hsu, Jean-Claude Diels   +2 more
doaj   +1 more source

Stable 100 GHz Pulses Generated by injection locking of multiple lasers to an optical frequency comb

, 2013
Optical frequency combs (OFCs) can generate a wide bandwidth of regularly spaced modes with high frequency stability. Besides frequency and time metrology, OFCs can also have applications in arbitrary waveform generation and telecommunications by ...
Wu, D.S., Slavík, R., Richardson, D.J., David J. Richardson, Radan Slavik, David S. Wu   +5 more
core   +1 more source

Spectral Peaked Optical Frequency Comb for Highly Sensitive Spectroscopy

Advanced Photonics Research
Optical frequency combs represent a breakthrough in the field of metrology. Because an optical frequency comb has a large number of comb modes, the optical energy is dispersed over the comb modes, and the optical energy per comb mode is very small.
Norihiko Nishizawa, Shotaro Kitajima, Hideki Tomita, Hisashi Abe   +3 more
doaj   +1 more source

High-Sensitivity and High-Precision RI Sensing Using THz-Comb-Based Frequency Multiplication and Dual-Comb Active-Dummy Temperature Compensation [PDF]

EPJ Web of Conferences
This paper presents a novel optical-comb-based refractive index sensor that simultaneously achieves high-sensitivity and high-precision by combining THz-comb-based frequency multiplication with active-dummy temperature compensation in a dual-comb ...
Higaki Masayuki, Taue Shuji, Tokizane Yu, Hase Eiji, Minamikawa Takeo, Yasui Takeshi   +5 more
doaj   +1 more source

Scalable Fabrication of Thermally Reconfigurable Ge Metasurfaces Using Stencil Lithography for Mid‐Infrared Molecular Fingerprinting

Advanced Functional Materials, EarlyView.
Scalable stencil lithography enables resist‐free fabrication of high‐index Ge metasurfaces for mid‐infrared molecular fingerprinting. Reversible thermo‐optic tuning provides post‐fabrication spectral control for precise resonance–vibration mode alignment, enabling enhanced molecular fingerprinting of microplastic particles.
Shovasis Kumar Biswas, Samir Rosas, Wihan Adi, Aidana Beisenova, Vaishakh Unnikrishnan, Furkan Kuruoglu, Filiz Yesilkoy   +6 more
wiley   +1 more source