Ultra-low noise dual-frequency VECSEL at telecom wavelength using fully correlated pumping

Hui Liu, Gregory Gredat, De Syamsundar, Ihsan Fsaifes, Aliou Ly, Rémy Vatré, Ghaya Baili, Sophie Bouchoule, Fabienne Goldfarb, Fabien Bretenaker

Research output: Contribution to journalArticlepeer-review

Abstract

An ultra-low intensity and beatnote phase noise dual-frequency vertical-external-cavity surface-emitting laser is built at telecom wavelength. The pump laser is realized by polarization combining two single-mode fibered laser diodes in a single-mode fiber, leading to a 100% in-phase correlation of the pump noises for the two modes. The relative intensity noise is lower than −140 dB∕Hz, and the beatnote phase noise is suppressed by 30 dB, getting close to the spontaneous emission limit. The role of the imperfect cancellation of the thermal effect resulting from unbalanced pumping of the two modes in the residual phase noise is evidenced.

Original languageEnglish
Pages (from-to)1794-1797
Number of pages4
JournalOptics Letters
Volume43
Issue number8
DOIs
Publication statusPublished - 15 Apr 2018
Externally publishedYes

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