Draw tower grating production method and system

A system for producing an optical fiber with inscribed gratings, the system comprising:

• a fiber drawing apparatus arranged for drawing an optical fiber,
• a writing system comprising:
• a coherent radiation source, wherein the coherent radiation source is a laser, and
• a radiation modulating means, configured for inscribing a grating in the optical fiber during a drawing process of the optical fiber, and
• a controller configured for controlling the writing system,
• wherein the fiber drawing apparatus comprises a fiber length and/or drawing detecting means for determining a fiber length and/or a fiber drawing speed and/or a fiber drawing parameter during the drawing process, and
• the controller being configured for capturing information from the fiber length and/or drawing detecting means and, for said controlling the writing system, configured for selecting and/or tuning a frequency of the laser based on the captured information captured from the fiber length and/or drawing detecting means.