Lampin
Jean-François Lampin, Templeuve FR
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20120261577 | Light Mixer for Generating Terahertz Radiation - The invention relates to a light mixer for generating terahertz radiation, comprising a photodetector (PHD) coupled to an antenna (AT) for terahertz radiation, characterized in that the photodetector comprises a layer of photoconductive material capable of absorbing optical radiation, said layer having a thickness that is less than the absorption length of said radiation by the photoconductive material and being contained between an at least partially transparent so-called upper electrode and a reflective so-called lower electrode, said lower and upper electrodes comprising a resonant cavity for said optical radiation. The invention further relates to a terahertz radiation source comprising such a light mixer and to two laser radiation sources arranged to stack two laser radiation beams on the upper electrode of the photodetector. The invention also relates to the use of such a light mixer for generating terahertz radiation via light mixing. | 10-18-2012 |
Jean-Francois Fernand Lampin, Templeuve FR
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20100033709 | INTEGRATED TERAHERTZ ANTENNA AND TRANSMITTER AND/OR RECEIVER, AND A METHOD OF FABRICATING THEM - An integrated antenna for transmitting or receiving radiation in a frequency range from 100 GHz to 3 THz, the antenna being characterized in that it comprises: a conductive ground plane (GP) deposited on a “top” surface (S) of a dielectric or semiconductor substrate (SB); a conductive ribbon (CR) extending above said ground plane (GP) and forming an angle (β) therewith, so as to form a radiating structure (RS) of the transverse electromagnetic wave horn type; and a planar waveguide (G) comprising at least first and second conductive strips (CS | 02-11-2010 |
Patrick Lampin, Fontainebleau FR
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20080253404 | DYNAMIC TIME DIVISION MULTIPLEXING CIRCUIT WITHOUT A SHADOW TABLE - In a telecommunication system adapted to exchange n-bit frames according to a dynamic time division multiplexing access method for a maximum of N accessible channels, the use of a shadow time slot assignment table is eliminated by use of a circuit that includes (a) an n×p memory block to store a time slot assignment table which describes the different time slot assignments by specifying which logical channel each bit position of an n-bit frame belongs to, (b) a register having N fields with a granularity of one bit, each bit indicates the status of the corresponding logical channel associated thereto, and (c) a logic circuit connected to the memory block and register that enables or disables the transmission of the logical channel identifier to a time slot assignor depending on the status bit value. | 10-16-2008 |
Quentin Lampin, Grenoble FR
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20130100941 | COMMUNICATION METHOD - A method for a node to transmit data in a telecommunications network is disclosed. In one method aspect, it comprises, selecting a time slot j in a window having a plurality of time slots and preceding a transmission period, listening to time slots preceding the time slot j, wherein the transmission period presents a plurality of transmission channels. Furthermore, the method comprises counting a number of time-slot transmissions during the time slots preceding the time slot j wherein when the number of time-slot transmissions is greater than a threshold, the data transmission is postponed or cancelled. Furthermore, when the number of time-slot transmissions is less than or equal to the threshold, a transmission is made during the time slot j, and one of the transmission channels is determined as a function of said number of time-slot transmissions. | 04-25-2013 |