Stable continuous-wave THz vector imaging based on an optical frequency comb

2021 ◽  
Author(s):  
Zuomin Yang ◽  
Zijie Lu ◽  
Shiwei Wang ◽  
Hongqi Zhang ◽  
Lu Zhang ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Optical Frequency

scholarly journals Coherent control of acoustic phonons in a silica fiber using a multi-GHz optical frequency comb

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Mamoru Endo ◽  
Shota Kimura ◽  
Shuntaro Tani ◽  
Yohei Kobayashi
Keyword(s):  
Coherent Control ◽  
Continuous Wave ◽  
Frequency Comb ◽  
Effective Interaction ◽  
Interaction Strength ◽  
Single Mode ◽  
Optical Frequency Comb ◽  
Material Structure ◽  
Optical Frequency ◽  
Acoustic Phonons

AbstractMulti-gigahertz mechanical vibrations that stem from interactions between light fields and matter—known as acoustic phonons—have long been a subject of research. In recent years, specially designed functional devices have been developed to enhance the strength of the light-matter interactions because excitation of acoustic phonons using a continuous-wave laser alone is insufficient. However, the strength of the interaction cannot be controlled appropriately or instantly using these structurally-dependent enhancements. Here we show a technique to control the effective interaction strength that does not operate via the material structure in the spatial domain; instead, the method operates through the structure of the light in the time domain. The effective excitation and coherent control of acoustic phonons in a single-mode fiber using an optical frequency comb that is performed by tailoring the optical pulse train. This work represents an important step towards comb-matter interactions.

scholarly journals Relationship between the voltage applied to MZM arms and the generation of optical frequency comb

2018 ◽  
Vol 7 (4.15) ◽  
pp. 405
Author(s):  
Yousif I. Hammadi ◽  
Tahreer S. Mansour
Keyword(s):  
Continuous Wave ◽  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Laser Source ◽  
Optical Frequency ◽  
High Data ◽  
Rate Transmission ◽  
Rf Signals ◽  
Rf Signal ◽  
Data Rate Transmission

In this study, an optical frequency comb source (OFCS) based on a dual-drive Mach–Zehnder modulator (MZM) is constructed and theoretically demonstrated. A mathematical model of the constructed OFCS is then built to investigate the effect of the peak-to-peak radio frequency (RF) signals applied to the MZM arms on the generated optical frequency comb (OFC) lines at the MZM output. A dual-drive MZM, a continuous wave laser source, and an RF signal source are included in the OFCS. The chirp parameter can be controlled and 64 comb lines generated at a comb spacing of 25 GHz by regulating voltages applied to the MZM arms. The developed OFCS is relatively simple but valuable. The generated OFC lines can be used for high data-rate transmission.  

scholarly journals Continuous wave sub‐THz photonic generation with VCSEL‐based optical frequency comb

2013 ◽  
Vol 49 (15) ◽  
pp. 944-945
Author(s):  
E. Prior ◽  
Á.R. Criado ◽  
C. Dios ◽  
P. Acedo ◽  
M. Ortsiefer ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Photonic Generation

scholarly journals Kerr optical frequency combs: theory, applications and perspectives

Nanophotonics ◽  
2016 ◽  
Vol 5 (2) ◽  
pp. 214-230 ◽  
Author(s):  
Yanne K. Chembo
Keyword(s):  
Continuous Wave ◽  
Frequency Comb ◽  
Kerr Nonlinearity ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Optical Frequency Combs ◽  
Frequency Combs ◽  
Comprehensive Survey ◽  
Microwave Signal Generation ◽  
Mode Locked Lasers

AbstractThe optical frequency comb technology is one of the most important breakthrough in photonics in recent years. This concept has revolutionized the science of ultra-stable lightwave and microwave signal generation. These combs were originally generated using ultrafast mode-locked lasers, but in the past decade, a simple and elegant alternativewas proposed,which consisted in pumping an ultra-high-Q optical resonator with Kerr nonlinearity using a continuous-wave laser. When optimal conditions are met, the intracavity pump photons are redistributed via four-wave mixing to the neighboring cavity modes, thereby creating the so-called Kerr optical frequency comb. Beyond being energy-efficient, conceptually simple, and structurally robust, Kerr comb generators are very compact devices (millimetric down to micrometric size) which can be integrated on a chip. They are, therefore, considered as very promising candidates to replace femtosecond mode-locked lasers for the generation of broadband and coherent optical frequency combs in the spectral domain, or equivalently, narrow optical pulses in the temporal domain. These combs are, moreover, expected to provide breakthroughs in many technological areas, such as integrated photonics, metrology, optical telecommunications, and aerospace engineering. The purpose of this review article is to present a comprehensive survey of the topic of Kerr optical frequency combs.We provide an overview of the main theoretical and experimental results that have been obtained so far. We also highlight the potential of Kerr combs for current or prospective applications, and discuss as well some of the open challenges that are to be met at the fundamental and applied level.

Two-Photon Transitions of 85 Rb 5 D 5/2 State by Using an Optical Frequency Comb and a Continuous-Wave Laser

2016 ◽  
Vol 33 (2) ◽  
pp. 023201
Author(s):  
Cao Shu-Kai ◽  
Fan Peng-Rui ◽  
Zhang Yi-Chi ◽  
Wang Li-Rong ◽  
Xiao Lian-Tuan ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Frequency Comb ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Continuous Wave Laser ◽  
Two Photon ◽  
Wave Laser

scholarly journals Broadband Enhancement of Optical Frequency Comb Using Cascaded Four-Wave Mixing in Photonic Crystal Fiber

2017 ◽  
Vol 2017 ◽  
pp. 1-5
Author(s):  
Tawfig Eltaif
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Continuous Wave ◽  
Frequency Comb ◽  
Four Wave Mixing ◽  
Optical Frequency Comb ◽  
Optical Frequency ◽  
Wave Mixing ◽  
Crystal Fiber ◽  
Cw Laser

A cascaded intensity modulator (IM) and phase modulator (PM) are used to modulate a continuous-wave (CW) laser and generate an optical frequency comb (OFC). Thus, the generated comb is utilized as an initial seed and combined with another CW-laser to generate four-wave mixing (FWM) in photonic crystal fiber (PCF). Results show that an initial flat 30 GHz OFC of 29, 55 lines within power fluctuation of 0.8 dB and 2 dB, respectively, can be achieved by setting the ratio of the DC bias to amplitude of sinusoidal signal at 0.1 and setting the modulation indices of both IM and PM at 10. Moreover, the 1st order of FWM created through 14 m of PCF has over 68 and 94 lines with fluctuation of 0.8 dB and 2 dB, respectively. Hence, the generated wavelengths of 1st left and right order of FWM can be tuned in a range from ~1500 nm to ~1525 nm and ~1590 nm to ~1604 nm, respectively.

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