TE polarization of optical emission from microdisk laser diodes of radius R55 mm, thickness L50.3 mm, is found to dominate both below and above room-temperature lasing threshold current, I th 52 mA. TE emission in the lasing mode at l51560 nm wavelength is due to higher optical gain for TE modes in the quantum well device. In our device geometry, the intrinsic whispering gallery resonances have...

A fully integrated 4-bit true time delay device using polymer optical switches and waveguide delay lines is demonstrated. The fabricated device, which contains five 2x2 thermo-optic switches, has a maximum power consumption of 143 mW and a switching time less than 3 ms. The rf phase error, which is affected by the optical switch cross talk, is also theoretically analyzed and proved to be neglig...

An optical add-drop multiplexer with a gratingloaded directional coupler in silica waveguides is demonstrated. The device for this configuration has a large fabrication tolerance and is small in size. A new scheme, in which the coupling length of the directional coupler is twice the complete coupling length, enables low cross-talk for both add and drop operations. This device is polarization-in...

We have demonstrated, the first time to our knowledge, a low input intensity (16nW/μm) high contrast (10:1) optical AND gate based on a VCSOA. In the experiment the device also shows an optical gain of 10dB. © 2003 Optical Society of America OCIS codes: (190.1450) Bistability; (200.4660) Optical logic

When optical antennas are used as light detectors, temperature changes their spectral response. Using this relation, we determine the spectrum of a light beam from an optical antenna's signal. A numerical evaluation of the temperature-spectral response has been completed with a model for the noise of the device. Using both the response and the noise model, we have established the capabilities o...

We describe a superconducting device capable of producing laser light in the visible range at half of the Josephson generation frequency with the optical phase of the light locked to the superconducting phase difference. It consists of two single-level quantum dots embedded in a p-n semiconducting heterostructure and surrounded by a cavity supporting a resonant optical mode. We study decoherenc...

We report a nanosecond sum-frequency generating optical parametric oscillator based on a single KTiOAsO4 crystal that is simultaneously phase matched for optical parametric generation and sum-frequency generation. Pumped at a wavelength of 1064 nm by a Q-switched Nd:YAG laser, this device produces 10.4-ns-long 8.3 mJ red pulses at a wavelength of 627 nm with 21% energy conversion efficiency. Th...

In this paper, we describe optical component and device technologies we have developed for next-generation photonic networks that achieve high tunability, high-speed transmission, and low power consumption. These include three-dimensional optical MEMS switches, acousto-opic tunable filters (AOTFs), lithium niobate optical modula-tors, and semiconductor lasers and optical amplifiers.

OPFET (Optical Field Effect Transistor) is a useful device for optical communication and as photo detector. In this paper, the I-V characteristics of the back illuminated OPFET are plotted using finite difference methods by solving the without time dependent continuity equations in which the incident radiation is allowed to enter through the substrate by inserting a fiber partially into the sub...

In this paper we present the characterisation of the phase noise and temporal shape of a quantum dash laser. The laser generates an optical comb with a line spacing of 24.5GHz, over a 10nm wide spectrum. The device can operate passively mode locked or actively locked to a synthesiser. The phase noise of the device has been measured and compared in both regimes. By actively mode locking the devi...