Nadine Lagay

High Gain

This letter demonstrates a planar junction GalnAs-AlInAs avalanche photodiode using back-side illumination through thinned InP substrate covered with chemical vapor deposition SiNx antireflection coating. The combined properties of very low dark current (I dark(M = 0) = 17 nA), low excess noise factor (f(M = 10) = 3.5), and high gain x bandwidth product over 140 GHz were simultaneously achieved with a high primary responsivity of 0.95 A/W at 1.55 mum.

\times

We demonstrate an AlInAs-InGaAs separate absorption, grading, and multiplication avalanche photodiode (APD) with a very thin avalanche layer operating at 1550 nm for 10-Gb/s optical transmission achieving simultaneously high responsivity (0.9 A/W at M = 1), very low excess noise factor (F(M=10) = 3), and very high gain-bandwidth product of 240 GHz. To our knowledge, this is the first time that a back-side illuminated planar junction AlInAs-InGaAs APD achieved such performances.

Bandwidth Product Over 140-GHz Planar Junction AlInAs Avalanche Photodiodes

We studied selective area growth modeling and characterization of the AlGaInAs material system. We used a three-dimensional vapor phase diffusion model to extract the effective diffusion lengths of Al, Ga, and In species from measured thickness profiles of the three binaries AlAs, GaAs, and InP. Our growth conditions yield to 50, 85, and 10 μm for Al, Ga, and In, respectively. Based on these values, we achieved a precise prediction of AlGaInAs thickness, composition, band gap, and biaxial strain variations in different selective area growth conditions. Particular attention was paid to the influence of neighboring cells in the case of high mask density. This configuration occurs in practical component mask layout. High mask density leads to interferences between masked cells and enhances the effect of the long diffusion length of aluminum and gallium species. Then, the biaxial strain is tensile shifted and the band gap is blue shifted in the vicinity of a mask, compared to reference material features grown...

240-GHz Gain-Bandwidth Product Back-Side Illuminated AlInAs Avalanche Photodiodes

Compact parallel transmitters and receivers with an aggregate capacity of 107 Gb/s are built through hybrid integration of arrays of ten 100-GHz spaced directly modulated lasers, arrays of ten avalanche photodiodes, and high-index contrast silica arrayed waveguide grating multi- and demultiplexers. Unamplified transmission over 75 km of standard single-mode fiber and 155-km amplified links is demonstrated in the C-band, by using a modulation format based on spectral offset filtering and electronic dispersion compensation.

Mask pattern interference in AlGaInAs selective area metal-organic vapor-phase epitaxy: Experimental and modeling analysis

We integrated an AlGalnAs modulator-amplifier using semi-insulating buried hetrostructure and selective area growth. The reflective component exhibits insertion gain, operates at 10Gbit/s over 80nm and links bi-directional 10km SMF up to 60°C.

DWDM Hybrid-Integrated TOSA and ROSA for 10

10Gb/s directly modulated tunable lasers, integrating chirp management ring resonators, have been designed and fabricated using wafer bonding. Using such a device, we demonstrated error-free transmission over 50km single mode fiber.

\,\times\,

Selective area growth enables to locally tune the epitaxial material thickness and composition on a single InP substrate. This paper presents this technology and its application to photonic integrated circuits, illustrated by two realisations.

10.7-Gb/s Transmission Over 75-km Links

This letter presents a comparative study of GaInAs-AlInAs avalanche photodiodes with different absorption layer thicknesses. Simulations concerning dark current and frequency response have been carried out to study the influence of the vertical structure on functional characteristics. Fabricated devices achieved gain-bandwidth product GtimesB as high as 180 GHz combined with very low dark current and low excess noise factor.

10 Gbit/s Semi-Insulating Buried Heterostructure Loss-less Reflective Amplified Modulator for Wavelength Agnostic Networks

Single Active Layer is used for self thermal compensation of threshold and power variation in AlGalnAs EML. 90km SMF up to 60°C and 50km SMF up to 70°C trans missions are demonstrated.

50km Error free transmission of fully integrated chirp-managed 10Gb/s directly modulated C-band tunable III-V/SOI hybrid lasers

We demonstrate a planar junction AlInAs APD using Carbon as p-doping impurity of the charge layer allowing to achieve simultaneously a high primary sensitivity of 0.9 A/W, a low dark current (Idark(M=10)=17 nA at ambient temperature), a low excess noise factor (f(M=10)=3.5) and high gaintimesbandwidth product over 140 GHz.