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  Frequency comb-referenced narrow linewidth diode laser system for coherent molecular spectroscopy

Döringshoff, K., Ernsting, I., Rinkleff, R.-H., Schiller, S., & Wicht, A. (2008). Frequency comb-referenced narrow linewidth diode laser system for coherent molecular spectroscopy. Applied Physics B, 91(1), 49-56. doi:10.1007/s00340-008-2955-0.

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Döringshoff, K.1, Autor
Ernsting, I.1, Autor
Rinkleff, Rolf-Hermann2, Autor           
Schiller, S.1, Autor
Wicht, A.2, Autor
Affiliations:
1External Organizations, , , ou_persistent22              
2Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, Hannover, DE, ou_24010              

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 Zusammenfassung: We analyze in detail the frequency noise properties of a grating enhanced external cavity diode laser (GEECDL). This system merges two diode laser concepts, the grating stabilized diode laser and the diode laser with resonant optical feedback, thus combining a large tuning range with an excellent short-term frequency stability. We compare the frequency noise spectrum of a GEECDL to that of a grating stabilized diode laser and demonstrate a 10-fold reduction of the frequency noise linear spectral density. The GEECDL is phase locked to a similar laser and to a fs-frequency comb with a servo loop providing an open-loop unity-gain frequency of only 237 kHz, which is a tenth of the bandwidth typically required for grating stabilized diode lasers. We achieve a residual rms phase error as small as 72 mrad (≈ 200 mrad) for stabilization to a similar laser (to the fs-frequency comb). We demonstrate that the novel diode laser can phase-coherently track a stable optical reference with an instability of 1.8×10-16 at 1 s. This laser system is well suited for applications that require phase locking to a low-power optical reference under noisy conditions. It may also be considered for the implementation of optical clock lasers.

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 Datum: 2008
 Publikationsstatus: Erschienen
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 Identifikatoren: eDoc: 359653
DOI: 10.1007/s00340-008-2955-0
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Titel: Applied Physics B
Genre der Quelle: Zeitschrift
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Seiten: - Band / Heft: 91 (1) Artikelnummer: - Start- / Endseite: 49 - 56 Identifikator: ISSN: 1432-0649