Liquid crystal-based tunable photodetector operating in the telecom C-band

Christophe Levallois; Benattou Sadani; Benjamin Boisnard; Thierry Camps; Cyril Paranthoen; Salvatore Pes; Sophie Bouchoule; Laurent Dupont; Jean-Baptiste Doucet; Mehdi Alouini; Véronique Bardinal

doi:10.1364/OE.26.025952

Journal articles

Liquid crystal-based tunable photodetector operating in the telecom C-band

Christophe Levallois ^{1, *} Benattou Sadani ² Benjamin Boisnard ² Thierry Camps ² Cyril Paranthoen ¹ Salvatore Pes ¹ Sophie Bouchoule ³ Laurent Dupont ^{4, 5} Jean-Baptiste Doucet ⁶ Mehdi Alouini ¹ Véronique Bardinal ²

* Corresponding author

1 Institut FOTON - Institut des Fonctions Optiques pour les Technologies de l'informatiON

2 LAAS-MICA - Équipe MICrosystèmes d'Analyse

LAAS - Laboratoire d'analyse et d'architecture des systèmes

3 C2N - Centre de Nanosciences et de Nanotechnologies [Marcoussis]

4 IMT Atlantique - IMT Atlantique Bretagne-Pays de la Loire

5 IMT Atlantique - OPT - Département Optique

6 LAAS-TEAM - Service Techniques et Équipements Appliqués à la Microélectronique

LAAS - Laboratoire d'analyse et d'architecture des systèmes

Abstract : Liquid crystal (LC) microcells monolithically integrated on the surface of InGaAs based photodiodes (PDs) are demonstrated. These LC microcells acting as tunable Fabry-Perot filters exhibit a wavelength tunability of more than 100 nm around 1550 nm with less than 10V applied voltage. Using a tunable laser operating in the S and C bands, photocurrent measurements are performed. On a 70 nm tuning range covered with a driving voltage lower than 7V, the average sensitivity for the PD is 0.4 A/W and the spectral linewidth of the LC filter remains constant, showing a FWHM of 1.5 nm. Finally, the emission spectrum from an Er-doped fiber is acquired by using this tunable PD as a micro-spectrometer.

Document type :

Journal articles

Domain :

Engineering Sciences [physics] / Optics / Photonic

Engineering Sciences [physics] / Micro and nanotechnologies/Microelectronics

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