Abstract: A receiver module includes an optical fiber configured to transmit a light beam, a collimating lens configured to collimate the light beam, a condensing lens configured to condense the light beam, and a light receiver including a sensor and a lens. The lens is disposed on the sensor, the lens and the sensor are connected to each other, and the sensor includes a light sensing zone. The condensing lens and the light receiver are disposed with respect to each other, and the light beam propagates sequentially through the optical fiber, the collimating lens, the condensing lens and the lens, and is incident on the sensor.

Abstract: An optical apparatus includes a prism, a plurality of filter elements, a plurality of lenses, a light receiver array, a collimator lens and a base. The prism includes a light entering surface and a light exit surface parallel to each other. The filter elements are disposed on the light exit surface. The lenses correspond to the filter elements. The light receiver array includes a plurality of light receivers which correspond to the lenses. The light signal including a plurality of sub-signals enters the prism through the light entering surface. The sub-signals are separated from the light signal by the filter elements and exit from the light exit surface of the prism, and each of the sub-signals is transmitted through one of the lenses to one of the light receivers. The base is a continuous-unitary piece for positioning other elements.

Abstract: An optical coupling device includes an optical coupling member, at least one photoelectric converter, and at least one optical fiber. The optical coupling member has a first surface, on which at least one first lens is provided, a second surface, on which at least one second lens is provided, and a reflective surface. The photoelectric converter faces the first lens of the optical coupling member, and the optical fiber faces the second lens of the optical coupling member. The optical coupling device satisfies a condition of 0.3<?<0.9; ?=NA1/NA2, where NA1 is a numerical aperture of the photoelectric converter; NA2 is a numerical aperture of the optical fiber.

Abstract: An optical coupling device includes an optical coupling member, an optical-electrical converting module, and at least two optical fibers. The optical coupling member has a first under positioning portion. The optical-electrical converting module has a substrate, a base, an optical signal transmitter, and an optical signal receiver. The base is made of an insulating material and is provided on the substrate. The base has a receiving portion and a second under positioning portion to engage the first under positioning portion. The optical signal transmitter and the optical signal receiver are receiving in the receiving portion and face the first lens portion when the second under positioning portion engages the first under positioning portion. The optical fibers are beside the optical coupling member and face the second lens portion.

Abstract: An optical coupling device includes an optical coupling member, an optical-electrical converting module, and at least two optical fibers. The optical coupling member has a first under positioning portion. The optical-electrical converting module has a substrate, a base, an optical signal transmitter, and an optical signal receiver. The base is made of an insulating material and is provided on the substrate. The base has a receiving portion and a second under positioning portion to engage the first under positioning portion. The optical signal transmitter and the optical signal receiver are receiving in the receiving portion and face the first lens portion when the second under positioning portion engages the first under positioning portion. The optical fibers are beside the optical coupling member and face the second lens portion.

Abstract: An optical line terminal and operation of optical network are provided. A light signal of the optical network unit is uploaded to an optical line terminal via a first channel. The light signal is processed by wave filtering, conversion, amplification and sampling so as to obtain a sampling signal. The light signal is uploaded to the optical line terminal via a second channel when all sampling values in the sampling signal are less than a threshold value.

Abstract: A light splitting and detecting system including at least one light splitting and detecting apparatus is provided. The light splitting and detecting apparatus is capable of receiving a first wavelength optical signal and a second wavelength optical signal. The light splitting and detecting apparatus includes a filter, light detecting unit, a first wavelength filtering unit and a slit. The filter is disposed on the transmission path of the first wavelength optical signal and the second wavelength optical signal. The first wavelength filtering unit is disposed between the filter and the light detecting unit. The slit is disposed between the first wavelength filtering unit and the light detecting unit and expose the light detecting unit.

Abstract: An optical coupling device includes an optical coupling member, at least one photoelectric converter, and at least one optical fiber. The optical coupling member has a first surface, on which at least one first lens is provided, a second surface, on which at least one second lens is provided, and a reflective surface. The photoelectric converter faces the first lens of the optical coupling member, and the optical fiber faces the second lens of the optical coupling member. The optical coupling device satisfies a condition of 0.3<?<0.9; ?=NA1/NA2, where NA1 is a numerical aperture of the photoelectric converter; NA2 is a numerical aperture of the optical fiber.