Method of manufacturing optical receiver module and apparatus for manufacturing the same

An apparatus for manufacturing an optical receiver module that includes a receptacle to which an optical connector holding an optical fiber is inserted, a lens that gathers light emitted from said optical fiber, and a CAN package including a planar PIN-PD as a light-receiving element that receives the light gathered by said lens,

• said apparatus comprising:
• a first holding unit that holds said receptacle;
• a second holding unit that holds said CAN package;
• a relative position adjustment unit that adjusts relative positions of said receptacle and said CAN package by moving said first holding unit and said second holding unit relative to each other;
• a photocurrent detection unit that detects a photocurrent generated by said light-receiving element;
• and
• a control unit that performs a control operation including operation control of said relative position adjustment unit, and a calculating operation based on the photocurrent detected by said photocurrent detection unit,
• said control unit carries out:
• adjusting relative positions of said receptacle and said CAN package including:
• determining a peak position in which a photocurrent generated by said light-receiving element reaches a peak value in a predetermined adjustment direction, while light is emitted from said optical fiber to said light-receiving element through said lens;
• and adjusting said relative positions to said peak position;
• and
• fixing said receptacle and said CAN package to each other in a position adjusted through said adjusting said relative positions,
• said adjusting said relative positions including:
• a first procedure to determine said peak position, while said adjustment direction is set to one direction in a plane perpendicular to a core direction of said optical fiber, and adjusting said relative positions to said peak position;
• and
• a second procedure to determine said peak position, while said adjustment direction is set to a direction perpendicular to said one direction in said plane, and adjusting said relative positions to said peak position;
• and
• a third procedure to determine said peak position, while said adjustment direction is set to said core direction, and adjusting said relative positions to said peak position;
• and
• at least one of said first through third procedures being carried out by performing a specific core adjusting process, said specific core adjusting process including:
• detecting the photocurrent generated by said light-receiving element, while moving said receptacle and said CAN package relative to each other in said adjustment direction within a first predetermined range, while using a multimode fiber of a MCP (Mode Conditioning Patch cord) or using a multimode fiber connected to said MCP as said optical fiber;
• and
• determining whether, there exist a first attenuation position and a second attenuation position in which said photocurrent shows a predetermined attenuation compared with said peak value within said first predetermined range, at in both directions of said adjustment direction from an interim peak position in which said photocurrent reaches said peak value within said first predetermined range;
• when there exist said first attenuation position and said second attenuation position, determining said peak position that is an arbitrary position located between said first attenuation position and said second attenuation position, and is located within a second predetermined range from a middle point between said first attenuation position and said second attenuation position.