GHz Ultrafast Lasers and Optical Frequency Combs

Dear Colleagues,

Ultrafast lasers with a GHz repetition rate exhibit a dense pulse interval of less than 1 ns and a wide longitudinal mode spacing of greater than 1 GHz. This time–frequency domain performance confers it significant advantages in specific application scenarios. For instance, in the next generation of material processing, this type of laser is able to suppress thermal damage to the bulk material and reduce the laser pulse energies required for ablation. For high-speed optical communication systems, these high-repetition-rate optical pulses are effectively implicated. However, after nearly two decades of development, some problems within this kind of laser remain to be solved, such as issues related to pulse-formation processing and long-term stability. In addition, optical frequency combs (OFCs) based on GHz ultrafast lasers can exhibit large mode spacing, a rapid acquisition speed, and a high signal-to-noise ratio, as well as the potential to be applied in a compact system. This makes it applicable in fields such as low-noise microwave generation and accurate broadband spectroscopy. However, there have been few reports on GHz OFCs based on the ultrafast fiber lasers with a GHz repetition rate, which makes it difficult to fully utilize the advantages of fiber platforms. Based on the two issues above, this Special Issue, entitled “GHz Ultrafast Lasers and Optical Frequency Combs”, aims to present an exploration of the mechanism, experimental results, and development of OFCs, and application related to such laser/OFC sources.

Now, we are excited to invite you to contribute an original or review article on “GHz Ultrafast Lasers and Optical Frequency Combs”. The submission deadline for abstracts is 30 September 2024.

Dr. Huihui Cheng
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• ultrafast lasers
• optical frequency combs
• GHz
• high repetition rate