Sub-100 fs all-fiber mode-locked laser at high repetition rates for THz spectroscopy
Ultrafast fiber lasers, as key enablers of powerful THz pulse generation, drive the recent advancements in THz technologies, specifically in THz-time domain spectroscopy. The research focuses on the generation of sub-100 fs pulses at telecom wavelengths (1500-1600 nm) suitable for high-repetition-rate THz pulse generation through photoconductive antennas. This work presents experimental results substantiated by numerical simulation, on both artificial saturable absorber (nonlinear polarization rotation) and physical saturable absorber (SESAM)-based mode-locked fiber lasers delivering sub-100 fs at a high fundamental repetition rate range of 60-80 MHz.
Authors
- Nimish Dixit (ORCID: https://orcid.org/0009-0000-3654-6986)
- Amartya Sengupta (ORCID: https://orcid.org/0000-0002-0195-9171)
- Aparajita Bandyopadhyay (ORCID: https://orcid.org/0000-0002-1661-1266)
- Sourav Das Chowdhury (ORCID: https://orcid.org/0000-0002-4961-5976)
- Joyoni Dey (ORCID: https://orcid.org/0000-0002-5757-4035)
- Debasis Pal (ORCID: https://orcid.org/0000-0003-4285-0049)
- Debashri Ghosh (ORCID: https://orcid.org/0000-0003-1020-4691)
- Atasi Pal (ORCID: https://orcid.org/0000-0003-0982-165X)
Institutions
- Goethe University Frankfurt (DE)
- Instruments Research & Development Establishment (IN)
- Indian Institute of Technology Delhi (IN)
Publication Details
- Journal
- Applied Optics
- Published
- 2025-08-18
- DOI
- https://doi.org/10.1364/ao.569541
- Primary Topic
- Spectroscopy and Laser Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00