Abstract: A dual-grating spectral beam combiner includes a series of sources emitting a respective series of diverging laser beams with mutually parallel center rays offset from each other in a one-dimensional array. The laser beam wavelengths are incremented monotonically across the array. A first diffraction grating receives the diverging laser beams from the sources and diffracts the diverging laser beams to form respective once-diffracted diverging beams with mutually converging center rays. A second diffraction grating is positioned where the center rays of the once-diffracted diverging beams coincide, and diffracts the once-diffracted diverging beams to form a single combined diverging laser beam consisting of twice-diffracted diverging beams. The combined diverging laser beam may be subsequently collimated.

Abstract: A fixture for aligning a linear array of optical fiber terminators includes a base and a heightwise stack of positioning devices disposed on the base. Each positioning device includes an anchor secured to a lengthwise wall of a bracket coupled to the base, a terminator holder flexibly coupled to the anchor and having a lengthwise channel for holding a respective optical fiber terminator, and actuators controlling position and yaw of the terminator holder in a plane orthogonal to the heightwise direction. The terminator holder has planar top and bottom surfaces that define a height of the terminator holder and interface with the terminator holder of any adjacent positioning device. The fixture also includes a clamp for clamping the positioning device stack against the base after setting the in-plane position and yaw of each terminator holder. Individual positioning devices may be adjusted or replaced without disturbing the rest of the stack.