摘要:
The present invention discloses a collimation lens and an optical module of the collimation lens. The collimation lens includes a front convex aspheric lens, a first polarizing filter, a Faraday rotation FR crystal, a second polarizing filter, and a rear convex aspheric lens. The front convex aspheric lens is coupled to a first end face of the collimation lens, and the rear convex aspheric lens is coupled to a second end face of the collimation lens. The first polarizing filter is coupled between the front convex aspheric lens and the FR crystal, and the second polarizing filter is coupled between the FR crystal and the rear convex aspheric lens.
摘要:
Disclosed are a filter, a method for producing a filter, and a laser wavelength monitoring apparatus, where the filter includes: two translucent bodies, where each of the translucent bodies has a first plane, a second plane that forms a wedge angle with the first plane, and a third plane that intersects with both the first plane and the second plane, first planes of the two translucent bodies are parallel to each other, and second planes of the two translucent bodies are parallel to each other; a beam splitting film, where surfaces of both sides are respectively combined with the first planes of the two translucent bodies; and two reflective films, respectively combined with the second planes of the two translucent bodies. A wavelength monitoring optical path of the laser wavelength monitoring apparatus in the solutions is significantly shortened compared with that in the prior art, a volume of the laser wavelength monitoring apparatus is relatively small, and miniaturized packaging can be implemented, which significantly reduces packaging costs of a product. In addition, monitoring precision is relatively high.
摘要:
The present invention discloses an avalanche photodiode and a manufacturing method thereof, relates to the field of communications, and can resolve a problem that an existing avalanche photodiode has a relatively strong dark current. The avalanche photodiode includes: a GeOI substrate; an I-Ge absorption layer (31), configured to absorb an optical signal and generate a photo-generated carrier; a first p-type SiGe layer (23), a second p-type SiGe layer (24), a first SiGe layer (21), and a second SiGe layer (22), where a Si content in any one of the SiGe layers is less than or equal to 20%; a first SiO 2 oxidation layer (72) and a second SiO 2 oxidation layer (73); a first Taper type silicon Si waveguide layer (11) and a second Taper type silicon Si waveguide layer (12); a heavily-doped n-type silicon Si multiplication layer (13); and anode electrodes (61) and a cathode electrode (62).
摘要:
A wavelength alignment method includes: emitting a first optical signal by using a laser; filtering the first optical signal by using a filter, and then transmitting a second optical signal; monitoring an extinction ratio of the second optical signal and an optical power of the second optical signal; and adjusting a working temperature of the laser and/or a working temperature of the filter to a target working temperature when the extinction ratio of the second optical signal exceeds an upper limit of a first extinction ratio threshold range and the optical power of the second optical signal exceeds a lower limit of a first optical power threshold range or when the extinction ratio of the second optical signal exceeds a lower limit of a first extinction ratio threshold range and the optical power of the second optical signal exceeds an upper limit of a first optical power threshold range, so that wavelength alignment of the filter and the laser is implemented. Correspondingly, embodiments of the present invention further provide a wavelength alignment apparatus, an optical transmitter and an optical network system.
摘要:
Disclosed are a filter, a method for producing a filter, and a laser wavelength monitoring apparatus, where the filter includes: two translucent bodies, where each of the translucent bodies has a first plane, a second plane that forms a wedge angle with the first plane, and a third plane that intersects with both the first plane and the second plane, first planes of the two translucent bodies are parallel to each other, and second planes of the two translucent bodies are parallel to each other; a beam splitting film, where surfaces of both sides are respectively combined with the first planes of the two translucent bodies; and two reflective films, respectively combined with the second planes of the two translucent bodies. A wavelength monitoring optical path of the laser wavelength monitoring apparatus in the solutions is significantly shortened compared with that in the prior art, a volume of the laser wavelength monitoring apparatus is relatively small, and miniaturized packaging can be implemented, which significantly reduces packaging costs of a product. In addition, monitoring precision is relatively high.
摘要:
This application discloses a transmitter optical subassembly, an optical component, an optical module, and a passive optical network system. The transmitter optical subassembly includes a substrate and a direct modulated laser disposed on the substrate. A single-stage isolator, a polarization direction rotator, and an optical branching filter are disposed side by side on the substrate in a light propagation direction. The polarization direction rotator can adjust linearly polarized light to P-polarized light, the optical branching filter includes an optical splitter subassembly and a filter subassembly, and an optical splitter film in the optical splitter subassembly is an optical splitter film with P polarization. The polarization direction rotator adjusts the incident linearly polarized light to the P-polarized light, and the optical splitter film in the optical branching filter is the optical splitter film with P polarization; therefore, all P-polarized light with single polarization can pass through the optical branching filter, without causing any polarization loss or two peaks. In this way, output optical power of the transmitter optical subassembly is increased, and the optical component can better implement a wavelength locking function.
摘要:
A material for blocking crosstalk, an optical assembly, and a method for preparing the material are provided. The material includes: a first layer of film (201), a substrate (202), and a second layer of film (203), where the first layer of film (201) and the second layer of film (203) are respectively plated on two sides of the substrate (202), the first layer of film (201) is non-hollowed-out, and alternately arranged grids and grid lines are disposed on a surface of the first layer of film (201). The optical assembly includes an optical receive assembly (901), where a periphery of the optical receive assembly (901) includes a transparent region (902) and a non-transparent region (903); the transparent region is made of the material, where a first layer of film (902a) is located on a side opposite to an optical receiving direction, and a second layer of film (902c) is located on a side opposite to the optical receive assembly (901); and the non-transparent region (903) is of an electrical-signal shielding structure. By using the foregoing material and optical assembly, it can be ensured that light and electricity are completely isolated, no electromagnetic leakage exists, and a better shielding effect is achieved, thereby improving receiving sensitivity and receive power.