The Dual Carrier LN
Modulator integrates 2 DP-QPSK LN
modulators onto 1 chip and 2 polarization beam couplers into 1 compact package to provide support for both 200G DP-QPSK and 400G DP-xQAM modulation formats.
By using the same ring resonator for both the wavelength control unit of the light source and the optical
modulator, Fujitsu Laboratories previously devised a structure that made the wavelengths of the light source and optical
modulator identical without the need for a thermal control mechanism.
In addition, engineering samples of 40Gb/s DQPSK and 100Gb/s DP-QPSK
modulators will become available in the fourth quarter of 2010, with Telcordia qualified volume production starting in the first quarter of 2011.
The
modulators provide excellent linearity with higher input IP3 values (> +26 dBm).
Ford, "Deformable MEMS micromirror array for wavelength and angle insensitive retro-reflecting
modulators," Proceedings of the IEEE LEOS Annual Meeting, Paper ThEE4, Puerto Rico, Nov.
Currently, Ashtiani is undertaking research in the area of direct carrier microwave
modulators for low cost mm-wave transmitters.
Each RF input passes through a 15 dB coupler before entering a vector
modulator.
Mixers and power splitters using the Blue Cell designs have been manufactured for over two years, and this complete family of
modulators as well as a Blue Cell transformer have been introduced recently.
The outputs of the I and Q
modulators are then fed to a broadband combiner that accurately sums the I and Q vectors.
