A multi-channel optical module includes a stem configured to allow an optical active element transmitting and receiving an optical signal to be installed thereon, an optical module frame connected to the stem and configured to have an optical element forming an optical path corresponding to the optical active element, and an external housing configured to house the optical module frame therein and coupled to the stem, wherein the optical element includes a lens and a filter unit disposed in the optical path and an optical waveguide element to which an optical fiber is connected.

A wavelength division multiplexing (WDM) transistor-outline (TO)-can assembly is provided that is capable of transmitting optical data signals having multiple wavelengths. The WDM TO-can assembly can be packaged in a relatively small package without requiring a large amount of plant retooling or capital investment, and that can be made available in the market relatively quickly. A plurality of the WDM TO-can assemblies can be incorporated into a small form factor or C form factor pluggable-type optical communications module to achieve high data rates.

Wavelength division multiplexing and demultiplexing (WDM) TOSA and ROSA TO-can assemblies are provided that are capable of transmitting and receiving optical data signals, respectively, having more than three wavelengths, that can be packaged in smaller packages than those used for existing BOSAs and tri-OSAs, that can be manufactured without requiring a large amount of plant retooling or capital investment, and that can be made available in the market relatively quickly.

An optical communication assembly includes a PCB, a first optical coupling module, a light deflection module, and a second optical coupling module. The PCB includes a plurality of light emitting elements emitting different color light signals. The first optical coupling module includes a plurality of first lenses corresponding with light emitting element. The light deflection module includes a plurality of light deflection elements corresponding with optical coupling lenses. The light deflection element includes a first reflecting surface reflecting light signal, and a plurality of dichroic surfaces reflecting light signal from the first optical coupling lens and transmitting the light signal from a front light deflection element. The second optical coupling module includes a second lens and an optical fiber, color light signals emitted from the light emitting elements are reflected and transmitted by the light deflection module and then altogether coupled into the optical fiber.

A multiwavelength optical sub-assembly module including a housing to be connected to an optical cable, a plurality of optical filter units coupled to the housing and configured to guide optical signals, a plurality of transceiver units coupled to the housing and configured to receive the optical signals through the optical filter units or transmit the optical signals to the optical filter units, and a substrate coupled to each of the transceiver units. Thus, distortion of an optical signal is suppressed, and the defect rate of a product is allowed to be decreased by evaluating reliability.

An apparatus includes a dichroic combiner array configured to combine multiple input optical beams and generate an output optical beam. The dichroic combiner array includes multiple mirrors and multiple dichroic filters. A first mirror is configured to reflect a first input optical beam towards a first dichroic filter, which is configured to combine the first input optical beam and a second input optical beam. A second mirror is configured to reflect a combined optical beam from the first dichroic filter to a second dichroic filter. A last dichroic filter is configured to generate the output optical beam. The apparatus also includes a beam dump array having multiple beam dumps configured to terminate stray optical energy. The stray optical energy includes at least one of: (i) optical energy reflecting from at least one of the dichroic filters and (ii) optical energy transmitted through at least one of the dichroic filters.

A multiplexer and demultiplexer (MDM) is disclosed. In one aspect, an MDM includes a plurality of filters arranged along a propagation direction. Each one of the filters has a thin-film filter (TFF) supported by a substrate. The filters are arranged so that each filter induces an opposite warpage of an optical signal traversing along the propagation direction than an immediately preceding filter.

Provided is a dense wavelength division multiplexing (DWDM) optical device having two light source chips, in which two or more semiconductor laser diode chips, respectively corresponding to a plurality of wavelength channels, are combined into one optical device package, and the respective semiconductor lasers are simultaneously driven to have a transmission speed twice faster than a case of driving one semiconductor laser.

The provided is an adjustable single-channel time-domain sampling filter, a spectrometer, and a detection method. The filter includes N stages of cascaded asymmetric interference units, where each asymmetric interference unit includes: a first waveguide splitting element, arranged at the input end, for splitting input light into two output paths; two interference arms, which respectively receive the light output from the two paths of the first waveguide splitting element and have different arm lengths; and a second waveguide splitting element, for combining the output light of the two interference arms to generate optical interference. Among the N cascaded asymmetric interference units, at least three are provided with phase modulators on their interference arms. When in use, the adjustable single-channel time-domain sampling filter tunes the phase modulators located in different cascaded asymmetric interference units to form optical channels with different spectral responses in the time sequence.