Abstract:
Optical switches and other similar optical configurations can comprise high-speed, high precision motors such as voice coil motors to carry out optical switching for applications such as optical signal based communication systems. These switches and configurations are expected to have switch time delays per channel that are significantly shorter than conventional optical switches. Some embodiments may have switch time delays that may be about a factor of 10 (or more) shorter than that for the conventional optical switch technology. Some embodiments may optimize optical coupling efficiency to increase the optical signal intensity transmission through optical switches and potential extend the useful life of the optical switches.
Abstract:
The invention concerns a method and a device for transmitting an optical wave comprising at least an input optical guiding means and an output optical guiding means between which an optical wave is capable of passing through via their adjacent end surfaces and actuating means for moving one of the optical guiding means relative to the other, wherein the detecting means (22) sense a measuring signal representing the optical wave intensity in the output guiding means (9); comparing means (24) compare the value of said measuring signal to a reference value associated with a desired value of the optical wave intensity in the output optical guiding means and delivering a comparison signal (26) according to the result of said comparison; and control means (26) subjected to said comparison signal delivering a signal controlling said actuating means (13a) to adjust the position of the input guiding means.
Abstract:
Control signal systems for use in configuring an optical switch such that a communication signal (702) transmittable from a first fiber end (710A) may be transmitted along a desired pathway (704) between the first fiber end (710A) and a second fiber end (712A) are disclosed. The systems include transmitting a control signal (706), either on-path or, if the switch is mirror based, off-path with a communication signal pathway (708) over which the communication signal is transmittable in the optical switch. The transmitted control signal (706) is received by a control signal detector (730) that is maintained in a known spatial relation relative to the desired pathway (704). A feedback signal relating to the spatial relationship between the communication signal pathway (708) and the desired pathway (704) is output by the detector (730). The feedback signal may be utilized in configuring the optical switch in order to make the communication signal pathway (708) coincident with the desired pathway (704) and thereby achieve transmission of the communication signal (702) over the desired pathway (704).
Abstract:
A fiber optic switch (400) includes a fiber optic switching module (100) that receives and fixes ends (104) of optical fibers (106). The module (100) includes numerous reflective light beam deflectors (172) arranged in a V-shape which may be selected as pairs for coupling a beam of light (108) between a pair of optical fibers (106). The module (100) also produces orientation signals from each deflector (172) which indicate its orientation. A portcard (406) supplies drive signals to the module (100) for orienting at least one deflector (172). The portcard (406) also receives the orientation signals produced by that deflector (172) together with coordinates that specify an orientation for the deflector (172). The portcard (406) compares the received coordinates with the orientation signals and adjusts the drive signals supplied to the module (100) to reduce any difference between the received coordinates and the orientation signals. The switch (400) also employs optical alignment to precisely orient pairs deflectors (172) coupling a beam of light (108) between optical fibers (106).
Abstract:
Loss equalization is provided in an optical communications network. Included in an optical communications network are a number of optical switches (10, 22) which include various elements for the routing of optical signals. The optical paths through the switches (10, 22) may introduce loss into the signals which causes the strengths of the various signals transmitted over the plurality of lines (15) to be different. Measurements of the optical signals may be taken at both the entry and the exit of the optical switch (10, 22). Through this measurement, losses through the paths are measured. This information may then be used to adjust the routing devices within the optical switch to equalize the losses occurring along the paths.
Abstract:
A fiber optic switch (400) includes a fiber optic switching module (100) that receives and fixes ends (104) of optical fibers (106). The module (100) includes numerous reflective light beam deflectors (172) which may be selected as pairs for coupling a beam of light (108) between a pair of optical fibers (106). The module (100) also produces orientation signals from each deflector (172) which indicate its orientation. A portcard (406) included in the switch (400) supplies drive signals to the module (100) for orienting at least one deflector (172). The portcard (406) also receives the orientation signals produced by that deflector (172) together with coordinates that specify an orientation for the deflector (172). The portcard (406) compares the received coordinates with the orientation signals received from the deflector (172) and adjusts the drive signals supplied to the module (100) to reduce any difference between the received coordinates and the orientation signals. The switch (400) also employs optical alignment to precisely orient pairs of deflectors (172) coupling a beam of light (108) between optical fibers (106).
Abstract:
A system and method for efficient coupling between optical elements comprises a memory containing an alignment module configured to align a light beam with an optical element to maximize coupling efficiency, and a processor coupled to the memory to control the alignment module. A position sensitive device indirectly senses a position of the light beam on the optical element and sends the position to the processor. The alignment module directly measures coupling efficiency where the light beam contacts the optical element. The alignment module identifies a direction of increasing coupling efficiency and aligns the light beam with the optical element along that direction until maximum coupling efficiency is achieved.