Abstract: A multi-port fiber optic device (100) includes a pair of opposite collimators (50, 51), of which each includes a V-groove dual fiber ferrule (20, 21) with a GRIN rod lens (2, 1). At least one band-pass DWDM thin film filter (4) is securely sandwiched between the two opposite GRIN rod lens (2, 1) of the pair of collimators (20, 21). The V-groove dual fiber ferrule (20, 21) is used to couple light in and out thereof and tune the thin film filter center wavelength to the ITU grid. The light coupled in from the input fiber (13) of the V-groove dual fiber ferrule (20) will be collimated and transmitted to the DWDM thin film filter (4). The part of the in-pass-band light will pass through the filter (4) as performing a demultiplexed channel and is successively coupled into the other collimator (21) aside.

Abstract: A retro-reflective multi-port fiber optic device (100) includes the triple-fiber ferrule (10) with a GRIN rod lens (12) to couple the light. The triple-fiber ferrule (10) with three fibers (18, 20, 22) thereof is attached to the angled facet of the GRIN rod lens (12) and the WDM filter (14) is attached to the opposite side of the lens (12). A reflective mirror (16) is attached next to the other side of the WDM filter (14) opposite to the lens (12) after alignment. The triple-fiber ferrule (10) is used to couple light in and out of the device, and tune the thin film filter center wavelength to the desired ITU grid.

Abstract: A multi-port fiber optic device (10) includes a dual fiber first collimator (12) which comprises a ferrule (18) with the input fiber (30) and the output fiber (32) therein, a gradient index rod lens (20) adhesively attached to the ferrule (18), and a filter (22) adhesively attached to the lens (20) opposite to the ferrule (18). A second collimator (14) is generally positioned in front of the first collimator (12), includes the similar components thereof while being symmetrical to the first collimator (12) along the middle portion of the whole assembly, except that one of the dual fiber of the second collimator (14) functions idle, thus the pigtail of such a fiber being removed.

Abstract: A V-groove dual fiber DWDM collimator (1) including an optical lens (10) and a V-groove dual fiber ferrule means (12) fixed with each other. The ferrule means (12) includes a V-groove chip (14) and a cover chip (20) commonly enclosed by a protective guiding sleeve (22) wherein two pigtail fibers (24, 26) are respectively received within the corresponding grooves (16) of the V-groove chip (14). The V-groove ferrule means (12) is itself fixed by adhering its own internal components (14, 20, 22) and the embedded fibers (24, 26), and also fixed to the lens (10).

Abstract: A retro-reflective multi-port fiber optic device includes the triple-fiber ferrule with a GRIN rod lens to couple the light. The triple-fiber ferrule with three fibers thereof is attached to the angled facet of the GRIN rod lens and the WDM filter is attached to the opposite side of the lens. A reflective mirror is aligned with and attached next to the other side of the WDM filter opposite to the lens. The triple-fiber ferrule, which is specifically selected from adense series of triple-fiber ferrules respectively defining three-fiber assemblies with different fiber spacings, is used to couple light in and out of the device, and tune the filter center wavelength to the desired ITU grid.

Abstract: A V-groove dual fiber collimator (1) including an optical lens (10) and a V-groove dual fiber ferrule means (12) fixed with each other. The ferrule means (12) includes a V-groove chip (14) and a cover chip (20) commonly enclosed by a protective guiding sleeve (22) wherein two pigtail fibers (24, 26) are respectively received within the corresponding grooves (16) of the V-groove chip (14). The V-groove ferrule means (12) is itself fixed by adhering its own internal components (14, 20, 22) and the embedded fibers (24, 26), and also fixed to the lens (10).

Abstract: An apparatus for measuring the IL (insertion loss) and the PDL (polarization dependent loss) of an optical device, includes a first switch adapted to connected to plural light sources on one side and to either a first depolarizer or a polarization controller on the other side thereof. A second switch is connected to both the first depolarizer and the polarization controller on one side and to the device under test on the other side. A detection instrument is connected to the device under test opposite to the second switch. Therefore, a first test path is set up from the light source, the first switch, the first depolarizer, the second switch, the device under test (DUT), to the detection instrument for measuring the pure IL of the DUT without the PDL involved therein, while a second test path is set up from the light source, the polarization controller, the second switch, the DUT, to the detection instrument for measuring the PDL of the DUT.

Abstract: An optics assembly (10) includes an associated optical fiber (12). A ferrule (14) is formed with an output end (16) of the fiber (12) as a reinforcement interface device for connectively confronting a lens (18). Both the ferrule (14) and the lens (18) are inserted into an resilient split holder (20) from two opposite open ends thereof for self-adjustment and self-alignment between both the ferrule (14) and the lens (18), thus assuring both of them are axially aligned with each other. An enclosure (24) encloses the split holder (20) and the associated ferrule (14) and lens (18), optionally.

Abstract: A filtering assembly includes a first substrate piece and a second substrate piece combined together with their dielectric band-pass filter-film adhered to each other in a face-to-face manner. A corresponding method for making the same includes following steps: (1) providing a raw substrate having at least a twice dimension of final assembly; (2) coating a designated dielectric band-pass filter-film on one side of said raw substrate; (3) dividing said coated substrate into two semi-finished substrate pieces with said filter-film thereon; (4) combining these two semi-finished substrate pieces together wherein said filter-film of one piece is directly adhered to that of another piece by a thin adhesive optical coupling layer, so that the filtering assembly has said filtering means sandwiched between said two substrates.

Abstract: A coupler (30) includes an enclosure (32) sealing therein a fiber assembly (34) consisting essentially of a pair of fibers (36). The fiber assembly (34) includes a hourglass-like configuration (38) on the middle portion wherein a reinforcement structure (40) is applied to the neck portion (42) of said fiber assembly so as to enhance the strength thereof, so that the whole coupler (30) can own a better mechanical character for convenient and reliable usage.

Abstract: An optics of a read/write system includes a stationary optical device for condensing a light beam and leading said light beam into an optical fiber. A distal end of the optical fiber is moveable and with a tapered configuration thereof for focusing the light emerging from the optical fiber into a beam spot on an optical recording medium. A detector detects through the optical fiber light reflected back from the recording medium.

Abstract: An optical fiber connector assembly (70) includes a duplex clip (30) having two cavities (32) and two standard SC type connectors (10) side-by-side received therein wherein one connector (10) inter-mates with an optical emitter and the other connector inter-mates with an optical detector. A loop-back optical fiber (20) is generally positioned in the rear exterior of the duplex clip (30) with two distal ends of the fiber being respectively connected to the rear ends of the corresponding two connectors (10) inside such duplex clip. A back shield (40) fixedly encloses the duplex clip (30) from the back wherein such back shield (40) further includes a rearwardly projection hermetic portion whose shape conforms to the configuration of such loop-back fiber (20) for protection. Also, for protection, two caps (48) can be optionally respectively attached to the front portions of the connectors (10) extending forwardly from the clip (30).

Abstract: A clip (10) is composed of two halves (12). Each half (12) has a main plate (14) from which a left side wall (16) and a right side wall (18) extend vertically at two opposite side edges. Each side wall (16, 18) incorporates a corresponding auxiliary wall (26, 28), which is extending vertically from the main plate (14) approximate a central slot (20) in the main plate (14), to form a cavity (22, 24) therein. A rear wall (30) extending from the rear edge of the main plate vertically, has two generally semi-circular openings (32, 34) therein in alignment with such two cavities (22, 24), respectively. A stopper (36) is formed generally in alignment with the auxiliary wall (28) which is facing to the right wall (18). A catch (42) and a latch (38) are respectively on the right and the left walls (18, 16).

Abstract: A SC type connector assembly includes a square hollow front housing (10) and a tubular rear housing (26) interconnected to each, other by means of protrusions (28) of the rear housing (26) captured by the corresponding aperture (18) of the front housing (10). An alignment ferrule (36) is positioned within the interior of the front housing (10) and the rear housing (26) with a spring (42) providing a biased force against the alignment ferrule (36) and the rear housing (26). The rear end of the alignment ferrule (36) extends a distance out of the rear end of the rear housing (26). An auxiliary spacer (50) abuts against the rear end of the rear housing (26). A crimping ferrule (44) is to circumferentially cover the rear portion of the rear housing (26) and most of the spacer (50) for sandwiching the strength members (70) and the jacket (72) of the optical fiber cable (74) therebetween. A boot (58) circumferentially covers the crimping ferrule (44).

Abstract: An optical package particularly suited for use with a pair of optical devices is disclosed. In a preferred embodiment, the package may house an optical transmitting device and an optical receiving device such that the package forms a transceiver. The package advantageously utilizes a number of molded plastic piece parts to reduce the package cost and simplify construction. By utilizing molded components, optical alignment within the package is automatically achieved.

Abstract: An optical fiber cable connector assembly includes a first tubular housing (1) and a second tubular housing (2) connected to each other by complementary threads (12) and (211). An alignment ferrule (3) positioned within the inner hollow portions of the first housing (1) and the second housing (2) is provided for enclosing and fastening an optical fiber cable (9) therein, and is associated with a coil spring (4) to provide a resilient bumper effect. The rear portion of the alignment ferrule (3) is dimensioned to extend out of the rear end of the second housing (2) a predetermined distance. A coupling nut (5) is slidable axially around the first housing (1) and the second housing (2) for coupling to a corresponding connector.

Abstract: The present invention discloses an optical fiber connector assembly for use in communication systems. The optical fiber connector assembly includes an insulating housing having complementary upper cover and bottom base members and at least one ferrule with the housing disposed longitudinally and parallel to the longitudinal axis at the free end of the housing. A multi-faceted key mechanism within the housing provides a marking feature to prevent improper connection of mating connectors. At the rear end of the bottom base and its corresponding upper cover there is provided a hollow retention bolt which is preassemblable and adapted to retain the optical fiber cable in position and to hold the two half-shells together. A dust-reject cover is provided having cooperating grooved recesses in opposite end walls sized to fit over and be retained on the connector cable when the connector is connected to another optical device and the dust cover must be removed from the housing.

Abstract: An optical package particularly suited for use with a pair of optical devices is disclosed. In a preferred embodiment, the package may house an optical transmitting device and an optical receiving device such that the package forms a transceiver. The package advantageously utilizes a number of molded plastic piece parts to reduce the package cost and simplify construction. By utilizing molded components, optical alignment within the package is automatically achieved.