| Patent Number |
Title Of Patent |
Date Issued |
| 6810182 |
Optical tunable grid-assisted add/drop filter in codirectional mode of operation |
October 26, 2004 |
| A tunealble optical grid-assisted add/drop filter for codirectional operational mode consisting of at least two waveguides composed of two different classes of material of different optical parameters. The thermal refractive index coefficient dn/dT, the electro-optic coefficient dn/dE or |
| 6553281 |
Device for determining a fixation point |
April 22, 2003 |
| The invention relates to a device for determining a fixation point (3) on screen (1), comprising an eye reference point detector (6) an a direction of view detector (9) which is mounted on a pivoting/inclining element (11) in such a way that it can be pivoted and inclined. By means of th |
| 6347166 |
Device for superposing optical signals with different wavelengths |
February 12, 2002 |
| The invention relates to a device for superposing optical signals of different wavelengths. The device is provided with a light guide grid disposed between an input free beam coupler and an output free beam coupler, the input free beam coupler being provided at its input side with at |
| 6240233 |
Integrated optical beam spread transformer |
May 29, 2001 |
| In an integrated structure of a beam spread transformer with several buffer layers separated from each other by light guiding layers there is provided on the upper buffer layer an unclad rib waveguide with a tapered section. Between the fiber-facing interface and the tapered section ther |
| 6215918 |
Thermo-optical switch |
April 10, 2001 |
| For reducing power consumption and cross-talk in the transmission of broadband optical signals without prior conversion into electrical signals there are provided in a thermo-optical switch two waveguides (WL1 and WL2) extending closely adjacent each other over their interactive length t |
| 6215805 |
Q-switched semiconductor laser |
April 10, 2001 |
| A Q-switched semiconductor laser is supposed to facilitate high-frequency laser modulation with low currents or voltage ranges. According to the invention, a laser of this type consists of at least one continually pumped active medium and two optically coupled resonators at least one of |
| 6122306 |
Self-pulsing multi-section laser |
September 19, 2000 |
| In a self-pulsing multi-section laser having two DFB sections, a Fabry-Perot-like resonator formed from two reflectors and a spacer is integrated into the multi-section laser and optically coupled to at least one DFB section. The spacer has a similar layer structure to the adjacent D |
| 6061481 |
Optoelectronic circuit |
May 9, 2000 |
| The invention concerns optoelectronic circuits for an optical wavelength multiplexing system, the circuits being constructed with optical couplers (11; 39.2, 39.4) each having four branches (1,2,3, 4; 39.1, 39.3, 2.times.39.5; 2.times.39.6, 39.3, 39.7). Electrical and optical crosstalk |
| 6008931 |
Optical frequency generator |
December 28, 1999 |
| An optical frequency generator provided with an optical comb generator for generating a plurality of frequencies including a central frequency and side bands spaced by a frequency transmitter. The central frequency is adjustably combined with the spectral component of a reference light |
| 5940207 |
Wavelength converter |
August 17, 1999 |
| The invention relates to a wavelength converter for converting a first light signal used for data transmission and having a first wavelength (.lambda..sub.in) into a second light signal having a second wavelength (.lambda..sub.out). The wavelength converter signal comprises a signal |
