Abstract
A novel mode-hope-free (MHF) tunable external cavity diode laser (ECDL) is demonstrated without mechanical pivot-point tuning. By corotating a periscope with an etalon and a narrow band pass (NBP) filter inside an external cavity, the cavity single longitudinal mode selection can be maintained, and continuous tuning can be achieved with optimal synchronization. A MHF continuous tuning range of 1.7 THz has been achieved with a semiconductor gain chip at the wavelength of 652±2 nm experimentally, and the theoretical tuning range can reach over 4.8 THz. The laser linewidth is estimated to be less than 1 MHz (FWHM) by a scanning Fabry-Perot (F-P) and a Michelson interferometer. 1 mW output power with variation of less than 10% in the tuning region of roughly 1.7 THz has been demonstrated
Original language | English |
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Article number | 3970 |
Pages (from-to) | 3970-3983 |
Number of pages | 14 |
Journal | Optics Express |
Volume | 31 |
Issue number | 3 |
Early online date | 19 Jan 2023 |
DOIs | |
Publication status | Published - 30 Jan 2023 |