J. Charil

Full-duplex performance assessment of in-line transceivers emitting at 1.3 μm and receiving at 1.55 μm

Starting from the signal-to-noise ratio formula for in-line transceivers, we evaluate the receiver performance in full-duplex operation. We show theoretically and experimentally two methods to obtain a system compatible sensitivity. Full-duplex sensitivities of -23.9 dBm and -19.1 dBm are demonstrated at 68 Mb/s and 196 Mb/s, respectively.

Suppression of fringe diffraction in localized holographic exposure for DFB laser arrays

A six-wavelength MQW DFB laser array emitting around 1.55 /spl mu/m realized in a single holographic lithography is described. Fringe-free localized grating isolation is attained using a mask with a novel aperture-edge design. The first-order grating periods as well as the ridge locations can be varied in a large span. The high throughput of holographic lithography is extended to multiwavelength DFB arrays.<<ETX>>

Versatile in-line transceiver chip operating in two full-duplex modes at 1.3 and 1.55 μm

We describe a transceiver chip which can perform full-duplex operation alternatively in the 1.3 /spl mu/m (TX)/1.5 /spl mu/m (RX) or 1.5 /spl mu/m (TX)/1.3 /spl mu/m (RX) mode. A full duplex sensitivity of -28.4 dBm is reported for the transceiver mode emitting at 1.55 /spl mu/m and receiving at 1.3 /spl mu/m.

Influence of gain saturation on the tuning range and tuning rate of three-contact DFB lasers and amplifier-filters: modelling and experiments

Summary form only given. The aim of the paper is to show the impact of the modal gain saturation on the tuning-range as well as the tuning rate of three-contact DFB lasers (and filters) at single current modulation. Taking into account the modal gain saturation due to gain-curve-shift, we have demonstrated theoretically and experimentally the feasibility of a wide wavelength tuning (2.5 nm) and a high tuning rate with a small power change by single (lateral) current tuning in the case of three-contact DFB lasers and filters.