Glass fine particle synthesis burner, glass fine particle deposition body manufacturing method, and glass fine particle deposition apparatus

A method of manufacturing a glass fine particle deposition body, comprising:

• emitting glass raw material via a glass raw material gas emission path of a glass fine particle synthesis burner having the glass raw material gas emission path, a ring-shaped combustible gas emission path arranged outside the glass raw material emission path, a ring-shaped combustion aiding gas emission path arranged outside the combustible gas emission path, and small diameter nozzles within the combustible gas emission path;
• emitting combustible gas via the ring-shaped combustible gas emission path of the glass fine particle synthesis burner;
• emitting combustion aiding gas via the ring-shaped combustion aiding gas emission path of the glass fine particle synthesis burner;
• and
• emitting the combustion aiding gas via the small diameter nozzles of the glass fine particle synthesis burner, wherein
• in a cross section of the glass fine particle synthesis burner formed by cleaving orthogonal to a central axis thereof, when the glass fine particle synthesis burner is divided into two regions by a predetermined straight line passing through a center of the glass fine particle synthesis burner, a total area of the small diameter nozzles in one of the regions is greater than a total area of the small diameter nozzles in the other region, and
• in the cross section of the glass fine particle synthesis burner formed by cleaving vertically through the central axis thereof, positions of the small diameter nozzles arranged within a combustible gas region do not have rotational symmetry such that the positions of the small diameter nozzles become the original positions only when the glass fine particle synthesis burner is rotated by n×360°, where n is an integer.