Abstract: An optical switch includes an input port (51), a plurality of output ports (52), a switching element (40) for switching light signals from the input port to any one of the output ports, a base (30), and a housing (10). The switching element has a driving device (400), a rotary holder (410) and two reflectors (422, 424). The reflectors are attached to a supporting arm (414) of the rotary holder, and positions of two counterweights (418) are adjustable on two balancing arms (416) to balance the combination rotary holder—reflectors around an axis of rotation. The input port is mounted in a center hole (352) of the base and the output ports are mounted in peripheral holes (354) defined in a circle around the center hole. Rotation of the rotary holder switches light signals from the input port to be output to any one of the output ports.

Abstract: An optical switch (99) according to the present invention comprises a housing (30), a first I/O port (10), a second I/O port (50), a driver (23) and a switching element (20). The housing holds the first I/O port and the second I/O port in alignment with a prism (22) having reflective surfaces (221, 222) and supports the driver on a substrate (31) of the housing. A mirror (21) of the switching element is rotationally attached to the driver, and is movable between a first position and a second position. In the first position, light beams from the first and second I/O ports transmit through the prism back to the second and first I/O ports, respectively; in the second position, light beams from the first and second I/O ports are reflected back to the first and second I/O ports by the mirror. Thus light signals from input fibers are switched between two output fibers of the I/O ports.

Abstract: An electrical variable optical attenuator includes a housing (1), a cover (2), an optical module (3), and a shifting device (4). The optical module comprises a reflective device (31), a graded transmittance filter (32), a filter carrier (33), and a container (38). The reflective device is an integrated piece comprising a first reflective plane (311), a second reflective plane (312), and an opening (313) movably accommodating the graded transmittance filter therein. The first and the second reflective planes are substantially perpendicular to each other. Because the first and second reflective planes are integrally formed on the reflective device, the attenuator is relatively easy to assemble. In addition, the attenuator is able to operate reliably in rugged conditions, including applications where the attenuator may be subjected to vibration, shock or extreme temperatures.

Abstract: An optical fiber cable holder (9) includes a main body (1) and a coupler (3). The main body comprises a holding member (11) and a fixing member (12). The holding member comprises a base portion (113), and a pair of holding arms (114) extending upwardly from opposite sides of the base portion. Each holding arm has a gradual bend at a terminal portion thereof. A receiving opening (116) is defined between the terminal portions to receive optical fiber cables (4) therethrough. The fixing member includes a support panel (121), a pivot portion (122) depending from support panel, a stop chassis (124) depending from the pivot portion, and an annular groove (123) being defined between the pivot portion and the stop chassis. The coupler is resiliently secured in the groove to retain the main body on a base (2). The holder is thereby rotatably fixed on the base, and prevents excessive bending or pulling of fiber cables retained in the holder.

Abstract: An optical switch (99) includes a base (10), two input ports (20, 40), two output ports (30, 50), a movable reflector assembly (60), a driving means (70) and a cover (80). The movable reflector assembly has a first reflector (61) with two outer reflecting surfaces (611, 612) and a second reflector (62) with two inner reflecting surfaces (621, 622). The light beams from the input ports propagate to the output ports by moving the movable reflector assembly up and down between a first position and a second position and switching the first reflector and the second reflector into the path of the light beams in turn.

Abstract: An optical fiber device (1) includes an upper cover (18), a lower cover (19), and two optical fiber holders (2). Each optical fiber holder includes a retaining body (10), a strain relief boot (20), and an interconnection member (30). A passage is defined in each optical fiber holder, for receiving a plurality of optical fibers therethrough. An inner rib (311) is formed on an inner surface of the interconnection member, and is engagingly received in a groove (112) defined in a front portion of the retaining body. Two parallel outer ribs (321) are formed on an outer surface of the interconnection member, and are engagingly received in corresponding grooves (162) defined in the upper and lower covers. An engaging bead (211) is formed at a front end of the strain relief boot, and is engagingly received in a rear groove (123) defined in an intermediate portion of the retaining body.

Abstract: An optical fiber holding device (100) comprises a fastening flange (120) and a coil-shaped fiber receiving portion (110) connecting with the flange. The receiving portion is formed by a wall (113) spiraling from an inner end (114) thereof outwardly. A central holding space (112), a spiral guiding passage (111), and an inlet (115) of the passage are thereby defined. The flange is connected with an outer end of the wall adjacent the inlet. A pair of through holes (121) is defined in the flange. The holding device is integrally formed by molding plastic material, or by bending a metal sheet. Each optical fiber (130) is inserted into the inlet, guided along the passage, and received in the central holding space. Screw s are extended through the through holes to secure the holding device together with the optical fibers to an optical module.

Abstract: A variable optical attenuator (10) comprises a base (12), a cover (13), an attenuation device (11), and optical fibers (17, 18). The attenuation device comprises a fixed collimator (111), a movable collimator (112), a holding device (113), and an adjusting device (117). The two collimators are aligned end-to-end. The holding device defines a passage (1131) in which the movable collimator is retained, and a threaded hole (1133). The adjusting device comprises a first screw rod (114), a second screw rod (115), and a rubber ring (116). The first screw rod comprises a thread portion (1141), a gear (1142), and a head (1143). The thread portion of the first screw rod is rotatably engaged in the threaded hole. The second screw rod comprises a thread portion (1151) and an adjusting slot (1153). The thread portion of the second screw rod meshes with the gear of the first screw rod.

Abstract: An optical switch (1) includes a cover (10), a base (20), two input ports (30,50), two output ports (40,60), a movable reflecting element (70), a fixed reflecting element (80), and a driving means (90). The movable reflecting element has a first mirror (71) and an opposite facing second mirror (72). The fixed reflecting element has a third mirror (81). The movable reflecting element is movable by the driving means from a first position, in which signals transmit from input to output ports without reflection from mirrors, to a second position, in which reflection from the mirrors effects a switching of the optical signals to different output ports. The presence of the fixed reflecting element automatically compensates for a distance between the first and second mirrors, allowing reflected signals to accurately align with respective output ports.

Abstract: An optical switch (80) includes a base (11), two input ports (20, 40), two output ports (30, 50), a reflector assembly (60), a driving means (70) and a cover (12). The reflector assembly has a first reflector (61) with two reflecting surfaces (611, 612) and a second reflector (62) with two reflecting surfaces (621, 622). The light beams from the input ports selectively propagate to the output ports by controlling the rotation angle (90° or N×90°; N: natural number) of the reflector assembly to be in a first position or a second position and therefore to switch different reflecting surface of the first reflector and the second reflector into the path of the light beams.

Abstract: An optical switch includes an input port (51), a plurality of output ports (52), a switching element (40) for switching light signals from the input port to any one of the output ports, a base (30), and a housing (10). The switching element has a driving device (400), a rotary holder (410) and two reflectors (422, 424). The reflectors are attached to a supporting arm (414) of the rotary holder, and positions of two counterweights (418) are adjustable on two balancing arms (416) to balance the combination rotary holder—reflectors around an axis of rotation. The input port is mounted in a center hole (352) of the base and the output ports are mounted in peripheral holes (354) defined in a circle around the center hole. Rotation of the rotary holder switches light signals from the input port to be output to any one of the output ports.

Abstract: A DWDM module (10) comprises a cover (1), a base (2), DWDMs (3), retainers (4) retaining the DWDMs therein, heat shrinkage pipes (5), optical fibers (33), and holders (6) holding the heat shrinkage pipes therein. The DWDMs are in communication with each other via the optical fibers. The DWDM module further comprises a rubber loop (7) providing a tight seal between the cover and the base, and a protecting component (8) for protecting the optical fibers. The base comprises a motherboard (26), a peripheral frame (21), spaced projections (22), and an array of arcuate ribs (23). The projections and corresponding sidewalls of the frame fittingly secure the holders therebetween. The array of ribs is upwardly formed from a middle of the motherboard, and fittingly secures the retainers therein. A cutout (212) is integrally defined in the motherboard and one sidewall of the frame, and fittingly secures the protecting device therein.

Abstract: An optical collimator comprises an optical fiber, a capillary, a GRIN lens and a glass tube. A bore is defined in the capillary. A conical depression is defined in an end of the capillary and in communication with the bore. The optical fiber is retained in the bore of the capillary. An end of the capillary is bonded with an end of the GRIN lens. The capillary and the GRIN lens are encased in the glass tube.

Abstract: A variable optical attenuator (99) comprises a holder (4), a rotatable mechanism (5), a refractor (6), an input port (2) and an output port (3). The input port and the output port are engaged with corresponding upright beams (42, 43) of the holder, which hold the input port and the output port in alignment with each other. The refractor is mounted on the rotatable mechanism by adhering to or soldering on a groove (52) of the rotatable mechanism, wherein the rotatable mechanism mates with a through hole (46) of the holder to make the center of the refractor and the optical axis of input and output collimators (22, 32) of the input and output ports in line.

Abstract: An optical fiber cable holder (1) includes a clasping portion (11) and a fixing portion (12). The clasping portion includes a top cover (1), and two side walls (112) depending from opposite sides of the top cover. A pair of bent arms (114) respectively extends from other opposite sides of the top cover, to prevent excessive bending of any cable (3) secured in the holder. A pair of spring arms (113) slants inwardly from the side walls, to retain the cables in the clasping portion. The fixing portion includes a pair of locking legs (121) and four stop latches (122). The locking legs are engagingly received through a pair of holes (21) defined in a base plate (2). The stop latches are supported on the base plate. The holder is thereby fixed on the base plate.

Abstract: An optical switch (1) having a sealing system connects to input fibers (42, 43) and output fibers (44, 45), and includes a switching device (5), a top housing (10), a bottom housing (30), a gasket (20) and four fiber clamps (40). The top and bottom housings each define a ringed channel (104, 304). The gasket includes a plurality of quadrate flanges (206). Each quadrate flange defines an elliptic opening (208) for inserting a fiber clamp holding a fiber. The gasket is received in the ringed channels of the top and bottom housings. When screws combining the top and bottom housings together are tightened, the gasket deforms to fill the ringed channels, thereby forming a good seal between an inside and an outside of the housing. The elliptic openings promote a balancing of stress in the quadrate flanges, increasing the life of the gasket.

Abstract: A mobile phone housing top of the present invention comprises a main body and a front wall, a rear wall, a left wall and a right wall depending from the main body. The main body comprises a speaker section, a display section, and a keypad section including a function key section and a data key section. The data key section comprises a plurality of oblique recesses and a number of data key receiving openings respectively defined in the oblique recesses. The data key receiving openings are aligned with the oblique recesses while at the same time being arranged in a matrix which is conventional for mobile phone data keys. A protrusion is formed between adjacent oblique recesses.

Abstract: An optical switch (1) having a sealing system connects to input fibers (42, 43) and output fibers (44, 45), and includes a switching device (5), a top housing (10), a bottom housing (30), a gasket (20) and four fiber clamps (40). The top and bottom housings each define a ringed channel (104, 304). The gasket is received in the ringed channels of the top and bottom housings. When screws combining the top and bottom housings together are tightened, the gasket deforms to fill the ringed channels, thereby forming a good seal between an inside and an outside of the housing.

Abstract: An optical fiber cable holder (1) includes a holding member (2) and a fixing member (3). The holding member includes a top cover (21), a pair of holding arms (22) extending from opposite sides of the top cover, a pair of spring arms (23) extending from other opposite sides of the top cover, and a pair of locking hands (24) extending from the spring arms. A guide slot (211) is defined in the top cover, and a pair of receiving holes (213) is defined in the holding arms for retainingly receiving optical fibers (4) therein. The fixing member includes a base plate (2), an locking ring (32) connected with the base plate, and a locking groove (34) defined between the locking ring and the base plate. The locking hands are slidably received in the locking groove. The holding member is thereby rotatably engaged with the fixing member.

Abstract: A variable optical attenuator (10) comprises a base (12), a cover (13), an attenuation device (11), and optical fibers (17, 18). The attenuation device comprises a fixed collimator (111), a movable collimator (112), a holding device (113), and an adjusting device (117). The two collimators are aligned end-to-end. The holding device defines a passage (1131) in which the movable collimator is retained, and a threaded hole (1133). The adjusting device comprises a first screw rod (114), a second screw rod (115), and a rubber ring (116). The first screw rod comprises a thread portion (1141), a gear (1142), and a head (1143). The thread portion of the first screw rod is rotatably engaged in the threaded hole. The second screw rod comprises a thread portion (1151) and an adjusting slot (1153). The thread portion of the second screw rod meshes with the gear of the first screw rod.