Abstract: An optical module and a method of assembling the optical module are disclosed. The optical module comprises a laser unit, a modulator unit, and a detector unit mounted on respective thermo-electric coolers (TECs). The modulator unit, which is arranged on an optical axis of the first output port from which a modulated beam is output, modulates the continuous wave (CW) beam output from the laser unit. On the other hand, the laser unit and the detector unit are arranged on another optical axis of the second output port from which another CW beam is output. The method of assembling the optical module first aligns one of the first combination of the laser unit and the modulator unit with the first output port and the second combination of the laser unit and the detector unit, and then aligns another of the first combination and the second combination.

Abstract: An optical transmitter module that generates a signal multiplexing two or more optical signals each having optical power satisfying a preset magnitude is disclosed. The optical transmitter module includes laser diodes (LD), adjusting lenses coupled with the LDs to generate dispersive optical outputs, and a concentrating lens that concentrates the dispersive optical beams onto a coupling fiber. A feature of the optical transmitter module is that the adjusting lenses are set closer to the LDs to adjust the optical power coupled with the coupling fiber.

Abstract: An optical module and a method of assembling the optical module are disclosed. The optical module comprises a laser unit, a modulator unit, and a detector unit mounted on respective thermo-electric coolers (TECs). The modulator unit, which is arranged on an optical axis of the first output port from which a modulated beam is output, modulates the continuous wave (CW) beam output from the laser unit. On the other hand, the laser unit and the detector unit are arranged on another optical axis of the second output port from which another CW beam is output. The method of assembling the optical module first aligns one of the first combination of the laser unit and the modulator unit with the first output port and the second combination of the laser unit and the detector unit, and then aligns another of the first combination and the second combination.

Abstract: An optical module and a method of assembling the optical module are disclosed. The optical module comprises a laser unit, a modulator unit, and a detector unit mounted on respective thermo-electric coolers (TECs). The modulator unit, which is arranged on an optical axis of the first output port from which a modulated beam is output, modulates the continuous wave (CW) beam output from the laser unit. On the other hand, the laser unit and the detector unit are arranged on another optical axis of the second output port from which another CW beam is output. The method of assembling the optical module first aligns one of the first combination of the laser unit and the modulator unit with the first output port and the second combination of the laser unit and the detector unit, and then aligns another of the first combination and the second combination.

Abstract: An optical module and a method of assembling the optical module are disclosed. The optical module comprises a laser unit, a modulator unit, and a detector unit mounted on respective thermo-electric coolers (TECs). The modulator unit, which is arranged on an optical axis of the first output port from which a modulated beam is output, modulates the continuous wave (CW) beam output from the laser unit. On the other hand, the laser unit and the detector unit are arranged on another optical axis of the second output port from which another CW beam is output. The method of assembling the optical module first aligns one of the first combination of the laser unit and the modulator unit with the first output port and the second combination of the laser unit and the detector unit, and then aligns another of the first combination and the second combination.

Abstract: A method to assemble a transmitter optical module is disclosed, where the optical module installs two lenses, one of which concentrates an optical beam emitted from a laser diode, while, the other collimates the optical beam concentrated by the former lens. The method has a feature that the first lens is firstly positioned in a point to collimate the optical beam coming from the laser diode, then, moved to a point, which is apart from the former point with respect to the laser diode, to concentrate the optical beam. The process performs the steps to position the lens by a jig to extract the optical beam passing through the first lens outside of the housing.

Abstract: A method to produce an optical module, which includes more than one signal lanes each providing a semiconductor laser diode (LD), a first lens, and a second lens, is disclosed. The method first places the first lens in a position at which the optical beam output from the LD becomes a collimated beam, then, slightly shifts so as to be apart from the LD to convert the optical beam into a concentrated beam. The second lens is first placed in a position at which the optical beam from the first lens becomes a collimated beam, then, shifted so as to be apart from the first lens such that the optical output get through the coupling fiber becomes within a preset range.

Abstract: A transmitting optical module that includes multi-laser diode (LDs) and a planar lightwave circuit (PLC) to multiplex optical beams each output from the optical sources is disclosed. The PLC is mounted on a carrier through a WG carrier in upside down arrangement. The LDs are also mounted on the carrier through an LD carrier. The LDs and the PLC are optical coupled with two lenses each having respective optical axes offset from the other such that the optical coupling of the optical beam inputting the PLC becomes a maximum.

Abstract: A transmitter optical module for emitting a polarization polarized combined beam is disclosed. The transmitter optical module includes optical sources each emitting optical beams with substantially the same polarizations, an optical isolator, and a polarization beam combiner. The optical isolator, by receiving the optical beams, outputs the optical beams with polarizations perpendicular to each other to the polarization beam combiner.

Abstract: A transmitter optical module that implements with two or more laser diodes (LDs) therein is disclosed. The LDs are mounted on a common sub-mount independent of driving circuits and driven by the driving circuits in the shunt-driving mode. The cathode of the LDs are independently, namely, isolated from the ground of the neighbor LDs, connected to the ground within the driving circuits but floated from the chassis ground.

Abstract: An optical coupling system to couple a collimated beam with a waveguide made of semiconductor materials is disclosed. The waveguide is implemented in an optical modulator and/or an optical hybrid, and has a core with a restricted cross section because of the enhanced refractive index of the semiconductor materials. The collimated beam is focused on the core by the two-lens system including first and second lenses. The first lens, having a focal length shorter than a focal length of the second lens, is first aligned with the core, then, the second lens is aligned with the core as compensating deviations of the first lens induced during the fixation thereof.

Abstract: An optical transmitter module that generates a signal multiplexing two or more optical signals each having optical power satisfying a preset magnitude is disclosed. The optical transmitter module includes laser diodes (LD), adjusting lenses coupled with the LDs to generate dispersive optical outputs, and a concentrating lens that concentrates the dispersive optical beams onto a coupling fiber. A feature of the optical transmitter module is that the adjusting lenses are set closer to the LDs to adjust the optical power coupled with the coupling fiber.

Abstract: A method to produce an optical module, which includes more than one signal lanes each providing a semiconductor laser diode (LD), a first lens, and a second lens, is disclosed. The method first places the first lens in a position at which the optical beam output from the LD becomes a collimated beam, then, slightly shifts so as to be apart from the LD to convert the optical beam into a concentrated beam. The second lens is first placed in a position at which the optical beam from the first lens becomes a collimated beam, then, shifted so as to be apart from the first lens such that the optical output get through the coupling fiber becomes within a preset range.

Abstract: An optical module that outputs a wavelength multiplexed optical signal is disclosed. The optical module provides at least first to third optical source, a wavelength multiplexer, a polarization rotator, and a polarization multiplexer. The optical sources each outputting first to third optical signals with a wavelength different from others. The wavelength multiplexer multiplexes the first optical signal with the third optical signal. The polarization rotator rotates the polarization vector of one of the multiplexed first and third optical signals and the second signal by substantially 90°. The polarization multiplexer multiplexes the polarization rotated optical signal with the second optical signal.

Abstract: A transmitter optical module for emitting a polarization combined beam is disclosed. The transmitter optical module includes optical sources each emitting optical beams with polarizations substantially same with others, an optical isolator, and a polarization beam combiner (PBC). The optical isolator, by receiving the optical beams, outputs the optical beams with polarizations perpendicular to the other to the PBC.

Abstract: A transmitter optical module is disclosed. The transmitter optical module has optical sources each emitting optical beam with a specific wavelength different from others and lenses corresponding to the optical sources. The optical sources and the lenses are mounted on a carrier. The carrier provides grooves surrounding rectangular areas where each of the lenses is mounted.

Abstract: A method to assemble a transmitter optical module is disclosed, where the optical module installs two lenses, one of which concentrates an optical beam emitted from a laser diode, while, the other collimates the optical beam concentrated by the former lens. The method has a feature that the first lens is firstly positioned in a point to collimate the optical beam coming from the laser diode, then, moved to a point, which is apart from the former point with respect to the laser diode, to concentrate the optical beam. The process performs the steps to position the lens by a jig to extract the optical beam passing through the first lens outside of the housing.