Fully integrated CMOS-compatible polarization analyzer

CMOS compatible integrated all-optical radio frequency spectrum analyzer.

We report an integrated all-optical radio frequency spectrum analyzer based on a ~4 cm long doped silica glass waveguide, with a bandwidth greater than 2.5 THz. We use this device to characterize the intensity power spectrum of ultrahigh repetition rate mode-locked lasers at repetition rates up to 400 GHz, and observe dynamic noise related behavior not observable with other techniques.

Fully Integrated CMOS Power Amplifier

Fully CMOS-Compatible Integrated Distributed Feedback Laser with 250 oC Fabricated Al2O3:Er Gain Medium

Emir Salih Magden1*, Purnawirman1, Nanxi Li1, Gurpreet Singh1, Jonathan D. B. Bradley1, Gale S. Petrich1, Gerald Leake2, Douglas D. Coolbaugh2, Michael R. Watts1, Leslie A. Kolodziejski1 Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA College of Nanoscale Science and Engineering, University at Albany, 1400 Washington Ave...

Fully integrated CMOS transmitter design considerations

Traditionally, multiple IC chips are needed to build transmitters (Tx) used in wireless communications. The difficulty with a full Tx integration is that each Tx building block uses different technology. A power-detection circuit will exploit the Schottky diode, while the modulator IC is integrated with BiCMOS or SiGe. Likewise, the digital control loop is implemented in CMOS. Now that directco...

Monolithically-integrated distributed feedback laser compatible with CMOS processing.

An optically-pumped, integrated distributed feedback laser is demonstrated using a CMOS compatible process, where a record-low-temperature deposited gain medium enables integration with active devices such as modulators and detectors. A pump threshold of 24.9 mW and a slope efficiency of 1.3 % is demonstrated at the lasing wavelength of 1552.98 nm. The rare-earth-doped aluminum oxide, used as t...