Franck Mallecot

Demonstration of RSOA-based remote modulation at 2.5 and 5 Gbit/s for WDM PON

This paper investigates the performance of a reflective semiconductor optical amplifier in a bidirectional wavelength-division multiplexed passive optical network at 2.5 and 5 Gbit/s over 20 and 15 dB link budget.

Transmission Quality Measurement of Two Types of 60 GHz Millimeter-Wave Generation and Distribution Systems

In this paper, we demonstrate and compare experimentally two techniques achieving very high-data-rates (> 1 Gb/s) wireless transmission in the 60 GHz window using radio over fiber (RoF) for reach extension. The first RoF link is based on a 10 GHz vertical-cavity surface-emitting laser and uses a multimode fiber. The radio signal is transported on an intermediate frequency of 4.5 GHz and electrically upconverted to 60 GHz after the optical link. The second uses an optical frequency upconversion from 4.5 to 60 GHz by direct modulation of a mode-locked Fabry-PEacuterot laser whose self-pulsating frequency is 54.8 GHz before transmission over a single-mode fiber. For both techniques, two different types of modulation were tested. The first one was an on-off keying at 1.5 Gb/s and the second one was an orthogonal frequency-division multiplexing-QPSK signal compliant to the IEEE 802.15.3.c prestandard (3.03 Gb/s). Radio propagation performance is also reported.

Analysis, fabrication, and characterization of 1.55-μm selection-free tapered stripe DFB lasers

A new selection-free laser structure for monomode behavior based on an engineering of the stripe geometry is proposed. The structure is designed in order to eliminate facet phase effects and laser to laser variations. The effect of spatial hole burning is simulated and an enhancement of the sidemode suppression ratio (SMSR) with power is predicted and measured. Moreover, the sensitivity to technological fluctuations is theoretically analyzed. Experimentally, lasers having a 47-dB SMSR at 10 mW and an excellent homogeneity from laser to laser is obtained on a two inch wafer.

DWDM Hybrid-Integrated TOSA and ROSA for 10

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.

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High system performances (-31 dBm), over wide temperature range, were demonstrated by a monolithic in-line transmit-receive-device, designed for single fibre, bi-directional transmission in full-duplex operation at 155 Mbit/s.

10.7-Gb/s Transmission Over 75-km Links

A selection-free DFB concept has been proposed and successfully demonstrated. By using only conventional manufacturing processes developed for the fabrication of DFB laser, a high SMR value of 43.5 dB @ 6 mW was obtained, with 0.19 W/A external facet efficiency as well as a 12 mA threshold current. The standard deviation of the emitted wavelength is as low as 0.11 nm, which underlines the spectral homogeneity of this approach. Under STM 16 transmission over 90 km of standard fiber, no floor is observed at 8% extinction ratio with a low system penalty of 1 dB. Moreover a good reproducibility is observed from laser to laser. These results demonstrate not only good performances of the structure under static and dynamic experiments but overall a very high uniformity of each characteristics. This demonstration is very encouraging, and open a new way for the fabrication of selection-free WDM lasers for STM 16 applications.

-31 dBm sensitivity of a monolithic transmit-receive-device over wide temperature range

Summary form only given. For extensive implementation of fiber-to-the-home (FTTH) networks, low-cost optoelectronic modules featuring bi-directional transmission (transceivers) are required. It is commonly believed that the manufacturing cost-down of the transceivers should be achieved by assembling optoelectronic components on one substrate. Typical examples are the planar light wave circuit platform technology and photonic integrated circuits (PICs). In-line type PIC transceivers, integrating a laser and a photodiode along a straight guide, are very attractive because they are very compact and can be fabricated using well-established industrial technology. We report the system performances at 155 Mbit/s, of an in-line transceiver prototype module emitting at 1.3 /spl mu/m and receiving at 1.55 /spl mu/m Without signal subtraction, a full-duplex sensitivity as low as -21.5 dBm was measured.

Selection-free WDM DFB lasers for STM16 applications

We report on a hybrid III-V/Silicon laser, designed for low noise class-A dynamics. The laser exhibits a Relative Intensity Noise below -145 dB/Hz from 100 MHz to 40 GHz.

Record sensitivity, in full-duplex operation at 155 mbit/s, of a BRS/ridge in-line transmit receive device

The demonstration of the FSAN class B sensitivity with 0 dBm emitted power in fiber points out the interest of this solution for the fabrication of customer module. Moreover, this approach combining an ultra-compact PIC circuit, a preamplifier and a small size connectorized module, opens a new technology breakthrough for the mass production of low cost modules for the access networks.