Patent ID: 8409889

Claim:
A method for producing a semiconductor optical device, comprising the steps of: forming a semiconductor region including a semiconductor layer on a substrate, the substrate including first and second areas; the first area including device sections; forming a first mask on the semiconductor region, the first mask including first patterns periodically arranged in the first area and a second pattern provided in the second area; forming a plurality of periodic structures in each of the device sections in the semiconductor region in the first area and a monitoring structure in the semiconductor region in the second area by using the first mask, the periodic structures respectively corresponding to the first patterns, the monitoring structure corresponding to the second pattern; measuring a shape of the monitoring structure; selecting a desired periodic structure from the plurality of periodic structures on a basis of a result of measuring the shape of the monitoring structure; forming a second mask including a pattern on the desired periodic structure; and forming stripe mesas including the desired periodic structure by using the second mask.