An optical device package in which an optical device is hermetically sealed is conventionally known as a technique for suppressing the effect of, for example, humidity. Particularly known is an optical device package with a cover including (i) an optically nontransparent section which is made of an optically nontransparent material and which has an opening and (ii) an optical window section which is made from an optically transparent material and which covers the opening (see Patent Literature 1).
FIG. 10 is a cross-sectional view schematically illustrating an optical device package 200 in accordance with conventional techniques. The optical device package 200 illustrated in FIG. 10 includes an optical device 101, a housing 102 which contains the optical device 101, and a cover 103 which is conformed to the housing 102. The cover 103 includes (i) a metal frame (optically nontransparent section) 105 having an opening 104 and (ii) an optical window section 106 covering the opening 104. The optical window section 106 can be realized by, for example, (i) mere glass or (ii) glass having an optically nontransparent material, such as a metal layer, provided on edges of and in the vicinity of the edges of the glass.
In the optical device package 200, the optical device 101 is contained in the housing 102 while the housing 102 is being filled with an inert gas (not shown), and is then hermetically sealed by the cover 103 and the housing 102.