An optical fiber array module that can accommodate variations in diameters of the optical fibers in the fiber array within anticipated tolerance, to accurately and securely retain the optical fibers in grooves in the module without using any solder interface or epoxy interface between the optical fibers and the supporting components. The fiber array module of the present invention relies on elasto-plastic interfaces for mechanical deformation, as opposed to solder reflow or epoxy curing, to accommodate variations in diameters of the optical fibers in the fiber array as supported in grooves between a substrate and a cover.

An optical axis alignment method may include the steps of taking an image of a lens holder and a holder base to obtain contour information before laser irradiation, detecting location information about a light path of a light beam which exits from a collimating lens, adjusting the position of the collimating lens by plastically deforming via laser irradiation, taking an image of a contour of a lens holder and a base member to obtain new contour information and detecting new location information about a light path of a light beam which exits from the collimating lens. If the accuracy is not within the predetermined allowable limits, the laser irradiation condition is corrected based on the contour information and/or the location information obtained both before and after the laser irradiation and the lens position adjustment is repeated.

Device and method are provided to align and bond a lens array to a PD array with high precision, which can implement aligning and bonding of the lens array automatically. A telescopic rod of the stepping actuator is adjusted until photosensitive areas of the PD array form a clear image on the image acquisition CCD through the lens array, an adjusted distance h1 of the telescopic rod is recorded, and a position coordinate (xn, yn) of center of each circular photosensitive area in the image may be obtained, and a slope k1 of a line connecting the centers of the photosensitive areas is calculated. The telescopic rod is adjusted again, and a slope k2 of a line connecting the centers of the apertures of the lens array is calculated. Based on calculated values Δxn, Δyn, arctan(k1)-arctan(k2), the high-resolution adjustment stage is adjusted to adjust position of the lens array.

An alignment feature formed in a lens block during manufacturing has a precise spatial relationship to an optical surface of the lens block such that precise alignment of the alignment feature within the lens block ensures precise alignment of the optical surface within the lens block. Precise alignment of the alignment feature within the lens block is readily assessable whereas precise alignment of the optical surface within the lens block is not. A determination is made as to whether the optical surface is aligned within the lens block by determining whether the alignment feature is aligned within the lens block, and if not, the extent of any misalignment. The extent of misalignment may then be used to adjust the manufacturing process to eliminate the alignment error.

Devices and systems to perform optical alignment by using one or more liquid crystal layers to actively steer a light beam from an optical fiber to an optical waveguide integrated on a chip. An on-chip feedback mechanism can steer the beam between the fiber and a grating based waveguide to minimize the insertion loss of the system.

A method of calibrating a collimating lens system includes transmitting, using an optical transmitter, a beam out of an optical fiber and through a collimating lens of the collimating lens system. The beam is reflected off a perfect flat mirror positioned at an output of the collimating lens and back towards the collimating lens, and received, via the collimating lens, at a power meter connected to the optical fiber. The method also includes adjusting a position of a tip of the optical fiber proximal to the collimating lens while tracking a power reading using the power meter, selecting a calibration position of the optical fiber corresponding to a highest power reading, and securing the optical fiber relative to the collimating lens using the calibration position.

Optical alignment between an optical waveguide device and an optical connection part is realized easily and at low cost. An optical circuit in which optical waveguides to be connected to optical fibers are formed includes: an alignment optical waveguide configured to be opposed to, on an optical waveguide edge face to which an optical connection part having guide holes for insertion of core wires of the optical fibers is to be fixed, a guide hole into which an alignment optical fiber is to be inserted; and a light path changing member configured to change a path of light to a vertical direction with respect to the optical axis direction of the core of the alignment optical waveguide.

An optical fiber securing device may include a passage, an optical fiber seat, and a boundary portion. The passage may have an entrance and an exit, the passage configured to receive therein an optical fiber inserted through the entrance, as well as an epoxy. An epoxy path may be provided as a pathway between an epoxy well and the passage. The optical fiber seat may be configured to receive at least a portion of the optical fiber, the optical fiber seat configured to position an end of the optical fiber in optical alignment with a lens. The boundary portion may define an upper boundary of the passage at the exit of the passage, and is configured to restrain epoxy received within the passage such that the epoxy does not become interposed between the end of the optical fiber and the lens.

An optical multiplexer and methods of making and calibrating the same are disclosed. A method of aligning components in a multichannel optical/optoelectronic transmitter includes passively fixing a plurality of light emitters in place on a substrate; adjusting positions of a first lens passing light from a first light emitter and an optical signal transmission medium receiving the light from the first light emitter until a far field spot of the light from the first light emitter is at or near an end of the transmission medium; fixing one or more optical subassemblies on the substrate; and adjusting positions of the optical subassembly(ies) to align light from the remaining light emitters with the far field spot. Some embodiments include multiple optical subassemblies, each including a lens and a filter. Other embodiments include one optical subassembly including a mirror and a beam combiner.

A receptacle with lens can be mounted to an optimum position without monitoring an optical power. In an optical module constructed by a photonic device, a photonic device pedestal mounting the photonic device thereto, a TO-CAN stem, a cap with window glass, and a receptacle with lens, the TO-CAN stem is fitted to the receptacle with lens, the receptacle with lens is provided with a lens which can obtain a predetermined coupling efficiency between the photonic device and an optical fiber mounted to the receptacle with lens, and the TO-CAN stem is fitted with no alignment and bonded and fixed to the receptacle with lens. Therefore, the optimum mounting position of the receptacle with lens is achieved only by the mounting accuracy of the photonic device and the parts dimensional tolerances of the TO-CAN stem and the receptacle with lens without directly monitoring the optical power from the photonic device.