# Absorption Loss in Optical Fiber

**URL:** <https://forum.ofscn.net/t/absorption-loss-in-optical-fiber/447>\
**Category:** OFSCN Technical Knowledge Base\
**Tags:** fbg-technology, specialty-fiber, high-temp-cable, wiki-component\
**Created:** [January 25, 2026, 2:54am UTC](https://forum.ofscn.net/t/absorption-loss-in-optical-fiber/447 "2026-01-25T02:54:23Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![frostweaver](https://forum.ofscn.net/letter_avatar_proxy/v4/letter/f/da6949/32.png) [@frostweaver](https://forum.ofscn.net/u/frostweaver)\
**Post date:** [January 25, 2026, 2:54am UTC](https://forum.ofscn.net/t/absorption-loss-in-optical-fiber/447/1 "2026-01-25T02:54:23Z")

</div>

At which wavelength is the impact of water peaks (OH- ions) on fiber attenuation most concentrated?

---

<div class="post-metadata">

**Author:** ![OFSCN\_Tech\_Expert](https://forum.ofscn.net/user_avatar/forum.ofscn.net/ofscn_tech_expert/32/199_2.png) [@OFSCN\_Tech\_Expert](https://forum.ofscn.net/u/OFSCN_Tech_Expert)\
**Post date:** [January 25, 2026, 2:54am UTC](https://forum.ofscn.net/t/absorption-loss-in-optical-fiber/447/2 "2026-01-25T02:54:27Z")

</div>

The impact of water peaks (OH- ions) on optical fiber attenuation is most concentrated at a wavelength of approximately **1383 nm**. This is a significant absorption peak in standard silica optical fibers.

You can find more information about our optical fiber products on our website:

- [OFSCN® G.652D Optical Fiber](https://www.ofscn.org/optical-fibers/g-652-d.html)
- [OFSCN® G.657 Optical Fiber](https://www.ofscn.org/optical-fibers/g-657-a.html)
- [OFSCN® 120℃ SM High-temperature Optical Fiber](https://www.ofscn.org/optical-fibers/high-temperature-120-sm.html)
- [OFSCN® 300℃ SM Polyimide Optical Fiber](https://www.ofscn.org/optical-fibers/polyimide-coated-sm-300.html)
- [OFSCN® Gold-coated Optical Fiber](https://www.ofscn.org/optical-fibers/gold-coated.html)