Journal Article

PUBDB-2024-06731

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Multi-band chirped mirrors for enhanced dispersion management

Chia, S.-H. (Corresponding author)CFEL*Extern* ; Li, Y.-C. ; Sun, C.-K. ; Kärtner, F.CFEL*XFEL.EU*DESY*

2025
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.optlastec.2024.111525

Abstract: Effective dispersion management for broadband and highly dispersive optical systems becomes increasingly vitalin ultrafast applications. While chirped mirrors provide a compact solution, their attainable dispersion is oftenlimited by the operational bandwidth. This study introduces innovative multi-band chirped mirror designs thatenable the management of group delay differences both within and between bands, further optimizing groupdelay dispersion across specific spectral regions. Here, we highlight the critical role of transmission group delaywithin multilayer coatings for broadband dispersion management, shifting the traditional interpretation whichrelies on the wavelength-dependent penetration of these coatings. We have thus developed a dual-band chirpedmirror pair achieving group delay dispersion values of − 100 fs$^2$ in the 0.6–0.8 µm range and − 260 fs$^2$ in the1.7–2.2 µm range, with the bands separated by more than an octave. Remarkably, this design outperformed astate-of-the-art ultrabroadband mirror pair by three and four times of group delay dispersion in the respectivebands. We have also designed and implemented a specialized dual-band mirror pair for nonlinear light microscopy—a prime example of ultrafast applications—and successfully achieved transform-limited pulses for targeted fluorophore excitations. This research emphasizes the transformative potential of strategic group delaydistribution, heralding a breakthrough in dispersive optical operations across specific wavelength ranges.

Note: ISSN 0030-3992 not unique: **2 hits**. Waiting for fulltext

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Contributing Institute(s):

1. Ultrafast Lasers & X-rays Division (FS-CFEL-2)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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