Abstract: An optical device is provided. The optical device includes a fiber array and an optical assembly. The fiber array includes a common channel and a plurality of divided channels arranged in parallel in a first direction and extending along a second direction, and the fiber array has a first surface from a top view perspective. The optical assembly is coupled to the first surface of the fiber array. The first surface and the common channel of the fiber array form an angle less than 90 degrees from the top view perspective.

Abstract: The present disclosure provides an optical assembly and a method of using an optical assembly. The optical assembly includes a carrier, a filter module on a primary surface of the carrier and disposed on a predetermined optical path, wherein the filter module includes a plurality of filter elements corresponding to a plurality of beams of different channels, a focal length adjuster disposed on the predetermined optical path, wherein at least a focal length of one of the plurality of beams is altered by the focal length adjuster, and a receiver extension configured to receive the plurality of beams via a plurality of sensing areas respectively at a receiving surface, wherein a beam size of each beams at the receiving surface is less than an area of each of the corresponding sensing areas.

Abstract: An optical device is provided. The optical device includes a substrate and a plurality of filters. The plurality of filters are disposed over the substrate. Each of the filters includes a support body, a filter layer, and a centrosymmetric spacer. The support body has a first side surface and a second side surface opposite to the first side surface. The filter layer is on the first side surface. The spacer is attached to the first side surface by a second adhesive layer on the first side surface. The centrosymmetric spacer is attached to the filter layer, at least a peripheral portion of the filter layer is free from being covered by the centrosymmetric spacer.

Abstract: A multi-channel wavelength division multiplexing/demultiplexing device includes optical filters for respective optical channels, and at least one microlens. The optical filters guide a light beam to travel along a preset optical path, and each optical filter filters a specific and different range of wavelength, and has a first surface for incident and reflective light, and a second surface for outgoing light through penetration as an output beam for the corresponding channel. Each microlens is installed between two adjacent optical filters to adjust optical beam shape of the traveling light along the optical path, particularly, altering a beam waist of a Gaussian beam and an imaging position to greatly increase optical efficiency of collimators for the whole system.

Abstract: Provided is a variable optical attenuator, including a pigtail, a spacer, a lens and a cap. The pigtail has a first waveguide and a second waveguide. The first waveguide transmits incident light, and the second waveguide receives the returned light. The pigtail is attached to one side of the space, and the lens is attached to another side of the space. Moreover, the cap includes a hollow portion, a first connecting portion and a second connecting portion. The lens is placed inside the hollow portion, and the space is connected to the first connecting portion of the cap.

Abstract: Provided is a variable optical attenuator, including a pigtail, a spacer, a lens and a cap. The pigtail has a first waveguide and a second waveguide. The first waveguide transmits incident light, and the second waveguide receives the returned light. The pigtail is attached to one side of the space, and the lens is attached to another side of the space. Moreover, the cap includes a hollow portion, a first connecting portion and a second connecting portion. The lens is placed inside the hollow portion, and the space is connected to the first connecting portion of the cap.

Abstract: A variable optical attenuator with wavelength-dependent loss compensation is provided, including: an optical fiber pigtail comprising at least a first waveguide and a second waveguide; a lens being disposed between the optical fiber pigtail and a reflector for focusing an emitted light from the first waveguide and returning a reflected light from the reflector to the second waveguide of the optical fiber pigtail; and the reflector being disposed at the focus of the lens to reflect the emitted light from the first waveguide passing the lens, and the reflected light passing through the lens to return to the second waveguide, the reflector having an initial position with a normal forming a pre-tilt angle with the axis of lens in the incident plane defined by the two axes, and the reflector tilting towards a larger tilt angle when an attenuation value increasing.

Abstract: A single optical fiber repeater system is provided, including a first external device, for generating a first signal; a second external device, for generating a second signal; a first optical fiber sharing apparatus, for transporting the first signal and receiving the second signal; a second optical fiber sharing apparatus, for transporting the second signal and receiving the first signal; and an optical fiber, for transporting the first signal and the second signal. Second optical fiber sharing apparatus converts the wavelength of the second signal into a wavelength different from that of the first signal for transport in the optical fiber. First optical fiber sharing apparatus converts the wavelength of the second signal into a wavelength identical to the wavelength of the first signal and transports to the first external device.

Abstract: A dynamic optical circulator device applicable to UPC-type and PC-type optical connectors is provided, including a first UPC/PC-type optical connector, a second UPC/PC-type optical connector, a third UPC/PC-type optical connector, a passive optical circulator, a reflected light detector and a transform element. The first, second and third UPC/PC-type optical connectors provide connections to optical fibers for receiving and transmitting optical signals. The first UPC/PC-type optical connector, the second UPC/PC-type optical connector and the third UPC/PC-type optical connector are connected to the three ports of the passive optical circulator, respectively, with the reflected light detector placed between the second UPC/PC-type optical connector and the second port of the passive optical circulator, while the transform element can be placed between any port of passive optical circulator and corresponding UPC-type and PC-type optical port.

Abstract: A single optical fiber repeater system is provided, including a first external device, for generating a first signal; a second external device, for generating a second signal; a first optical fiber sharing apparatus, for transporting first signal and receiving second signal; a second optical fiber sharing apparatus, for transporting second signal and receiving first signal; and an optical fiber, for transporting first signal and second signal. Second optical fiber sharing apparatus converts wavelength of second signal into a wavelength different from first signal for transport in optical fiber. First optical fiber sharing apparatus converts wavelength of second signal into a wavelength identical to wavelength of first signal and transports to first external device. By transporting in different wavelengths over an optical fiber because transporting and receiving share same path, time delay is reduced, as well as the material used and labor cost.

Abstract: A wavelength selector for transmitting radiation of multiple wavelengths. The wavelength selector includes a four-fiber collimator and provides a first input, first output, second input, and second output channel. The first input channel carries radiation of multiple wavelengths. The second input channel carries the radiation of a first wavelength to be added to the first input channel. The second output channel receives the radiation of a predetermined wavelength that is to be dropped. A switch member with a plurality of filters is movable among a plurality of positions. When the switch member is in a first position, the radiation carried by the first input channel reaches the first filter, and the radiation of the first wavelength carried by the second input channel reaches the second filter. The second output channel receives the radiation of a predetermined wavelength carried by the first input channel.

Abstract: A wavelength division multiplexer (WDM) and a type of fiber arrangement for the WDM are provided. In the WDM according to the invention, a filter having dielectric coating is used to allow lights within a specific band of wavelength to pass but reflect lights not within the specific band of wavelength. A reflection mirror is then used to reflect the lights passing through the filter to pass through the filter for a second time. Because of the two filtering, the WDM provided by the invention has very high adjacent channel isolation. In particular, the WDM contains a fiber pigtail having a fiber bundle and a ferrule with a square aperture in the center. By carefully arranging the common input fiber, the reflection output fiber, and the transmission output fiber inside the aperture, the lights in the specific band of wavelength have identical wavelength bandwidth when passing through the filter twice, and the insertion loss for both the transmission output and the reflection output is minimum.

Abstract: A zigzag wavelength division multiplexer. The zigzag wavelength division multiplexer reduces the wavelength shift in the center of a frequency band caused by temperature changes. The zigzag wavelength division multiplexer includes an intermediate block, an input end and a plurality of output ends. The input end has a first sleeve and an optical collimator disposed in the first sleeve. Each of the output ends has a second sleeve, a wave filter and an optical collimator. The optical collimator and the wave filter are disposed in the second sleeve. The zigzag wavelength division multiplexer reduces use of the GRIN lens and glass ferrule, and thereby manufacturing costs.

Abstract: A compact add-drop multiplexer with low wavelength temperature sensitivity. In the present invention, a plurality of spacer rings is disposed between the optical elements of the add-drop multiplexer, and a heat curing epoxy or an ultraviolet curing epoxy adheres the optical elements to each other. The spacer rings are formed with a thermal expansion coefficient within a predetermined range to compensate for thermal stress of the WDM filter.

Abstract: A high-isolated wavelength managing module, having four ports, has at least a first, a second and a third wavelength managing modules, and the optical circulators comprise a first and a second optical circulators. The first wavelength managing module receives and carries first optical signals with different wavelengths, and the third wavelength managing module receives and carries second optical signals with different wavelengths, the first and the second optical signals are transmitted in opposite direction and with different wavelengths. The first optical circulator is connected between the first and the third wavelength managing module and the second optical circulator is connected between the second and the third wavelength managing module. Further, the third wavelength managing module can be omitted and the first and the second optical circulator are directly connected.

Abstract: An optical function module for bi-directional wavelength-division multiplexer (WDM) optical communication system comprises at least one wavelength managing module, and at least one uni-directional optical function module. The wavelength managing module has a plurality of ports, and optically couples between a first optical transceiver and a second optical transceiver, wherein the first and the second optical transceivers provides a first and a second optical channels respectively for transmitting a plurality of optical signals with different wavelengths. The uni-directional optical function module has a high isolation function, and couples to the ports of the wavelength managing module. In addition, the uni-directional optical function module with high isolation can be replaced by an uni-directional optical function module without high isolation and an optical isolator.