scholarly journals Optical Frequency Comb Expansion Using Mutually Injection-Locked Gain-Switched Lasers

2021 ◽  
Vol 11 (15) ◽  
pp. 7108
Author(s):  
Prajwal D. D. Lakshmijayasimha ◽  
Prince M. Anandarajah ◽  
Pascal Landais ◽  
Aleksandra Kaszubowska-Anandarajah
Keyword(s):  
Frequency Comb ◽  
Phase Correlation ◽  
Optical Frequency ◽  
Photonic Integration ◽  
Optical Frequency Combs ◽  
Frequency Combs ◽  
Highly Correlated ◽  
High Degree ◽  
Better Than

We propose a novel scheme for the expansion and comb densification of gain-switched optical frequency combs (GS-OFC). The technique entails mutual injection locking of two gain-switched lasers with a common master to generate a wider bandwidth OFC. Subsequently, the OFC is further expanded and/or densified using a phase modulator with optimum drive conditions. We experimentally demonstrate the generation of an OFC with 45 highly correlated lines separated by 6.25 GHz with an expansion factor ~3. In addition, operating in comb densification mode, the channel spacing of the OFC is tuned from 6.25 GHz to 390.625 MHz. Finally, a detailed characterization of the lines, across the entire expanded comb, is reported highlighting the excellent spectral purity with linewidths of ~40 kHz, a relative intensity noise better than –152 dB/Hz, and a high degree of phase correlation between the comb lines. The proposed method is simple, highly flexible and the architecture is suitable for photonic integration, all of which make such an OFC extremely attractive for the employment in a multitude of applications.

Development of a Non-Contact Precision Measurement Technique Using Optical Frequency Combs

2012 ◽  
Vol 523-524 ◽  
pp. 877-882 ◽  
Author(s):  
Taro Onoe ◽  
Satoru Takahashi ◽  
Kiyoshi Takamasu ◽  
Hirokazu Matsumoto
Keyword(s):  
High Resolution ◽  
Frequency Comb ◽  
High Sensitivity ◽  
Distance Measurement ◽  
New Method ◽  
Optical Frequency ◽  
Optical Frequency Combs ◽  
High Frequencies ◽  
Frequency Combs ◽  
Lock In

We develop a new method for high-resolution and contactless distance measurement based on self frequency beats of optical frequency combs. We use two optical frequency comb lasers with Rb-stabilized repetition frequencies for doing accurate distance measurement. The repetition frequencies of the optical frequency combs are different, thus parts of the high frequencies such as several gigahertz of self beats are beat-downed to several megahertz without an RF frequency oscillator. The phases of the beat signals of several megahertz frequencies are measured by a lock-in amplifier with a high resolution and high sensitivity. The new method is applied to distance measurement for objects which have rough-surface in the distance range of several-meters.

Phase Correlation Between Lines of Electro-Optical Frequency Combs

2018 ◽  
Author(s):  
Lars Lundberg ◽  
Mikael Mazur ◽  
Attila Fülöp ◽  
Victor Torres-Company ◽  
Magnus Karlsson ◽  
...  
Keyword(s):  
Phase Correlation ◽  
Optical Frequency ◽  
Optical Frequency Combs ◽  
Frequency Combs

Numerical simulation and temporal characterization of dual-pumped microring-resonator-based optical frequency combs

2017 ◽  
Vol 5 (3) ◽  
pp. 207 ◽  
Author(s):  
Xiaohong Hu ◽  
Weiqiang Wang ◽  
Leiran Wang ◽  
Wenfu Zhang ◽  
Yishan Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Microring Resonator ◽  
Optical Frequency ◽  
Optical Frequency Combs ◽  
Frequency Combs

Optical frequency combs: Coherently uniting the electromagnetic spectrum

Science ◽  
2020 ◽  
Vol 369 (6501) ◽  
pp. eaay3676
Author(s):  
Scott A. Diddams ◽  
Kerry Vahala ◽  
Thomas Udem
Keyword(s):  
Radio Frequency ◽  
Frequency Comb ◽  
Electromagnetic Spectrum ◽  
Optical Frequency ◽  
Frequency Signal ◽  
Optical Frequency Combs ◽  
Laser Technology ◽  
Vast Array ◽  
Radio Frequency Signal ◽  
Frequency Combs

Optical frequency combs were introduced around 20 years ago as a laser technology that could synthesize and count the ultrafast rate of the oscillating cycles of light. Functioning in a manner analogous to a clockwork of gears, the frequency comb phase-coherently upconverts a radio frequency signal by a factor of ≈105 to provide a vast array of evenly spaced optical frequencies, which is the comb for which the device is named. It also divides an optical frequency down to a radio frequency, or translates its phase to any other optical frequency across hundreds of terahertz of bandwidth. We review the historical backdrop against which this powerful tool for coherently uniting the electromagnetic spectrum developed. Advances in frequency comb functionality, physical implementation, and application are also described.

scholarly journals Optical Frequency Comb Generation based on Erbium Fiber Lasers

Nanophotonics ◽  
2016 ◽  
Vol 5 (2) ◽  
pp. 196-213 ◽  
Author(s):  
Stefan Droste ◽  
Gabriel Ycas ◽  
Brian R. Washburn ◽  
Ian Coddington ◽  
Nathan R. Newbury
Keyword(s):  
Frequency Comb ◽  
Building Blocks ◽  
Laser Frequency ◽  
Optical Frequency ◽  
Laser Amplifier ◽  
Optical Frequency Combs ◽  
Frequency Combs ◽  
Comb Generation ◽  
Optical Frequency Metrology ◽  
Frequency Metrology

AbstractOptical frequency combs have revolutionized optical frequency metrology and are being actively investigated in a number of applications outside of pure optical frequency metrology. For reasons of cost, robustness, performance, and flexibility, the erbium fiber laser frequency comb has emerged as the most commonly used frequency comb system and many different designs of erbium fiber frequency combs have been demonstrated. We review the different approaches taken in the design of erbium fiber frequency combs, including the major building blocks of the underlying mode-locked laser, amplifier, supercontinuum generation and actuators for stabilization of the frequency comb.

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.

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