Abstract: Techniques are disclosed herein for laser glass welding optical components to a substrate using fiducial markers to create optical devices. An example optical device disclosed herein comprises a substrate and an optical system. The substrate includes a component surface, a back surface opposite the component surface, and a plurality of fiducial markers within the substrate between the component surface and back surface. The optical system is configured to process light. The optical system includes a plurality of optical components on the component surface of the substrate, and each optical component is aligned to a respective fiducial marker.

Abstract: An optical assembly can include a pedestal attached to a substrate and a first optical component laser welded to the pedestal. In some examples, a. bond between the first optical component and the pedestal can be formed from material of at least one of the first optical component and the pedestal melted via later welding. In some examples, the first optical component can be positioned to receive light from a second optical component, attached with the substrate, or transmit light to the second optical component. In some examples, a pedestal can include a first pedestal surface that is attached to the substrate and a second pedestal surface, angled with respect to the first pedestal surface, that is attached to an optical component. In some examples, a pedestal can include a first pedestal element attached to a second pedestal element, such as by laser welding.