Intelligent Quotation of Fiber Bragg Gratings

Custom Fiber Bragg Gratings (FBGs) typically start around $1,250 for a small fabrication run with three samples, with pricing varying based on wavelength, type, and packaging.

Pricing Overview

For custom FBG fabrication, companies like Agiltron offer FBGs across wavelengths from 400 nm to 2000 nm. A typical setup cost for a small run with ±0.2 nm wavelength accuracy and ~1 nm linewidth is $1,250, which includes three custom samples. Additional costs may apply for specialized coatings (polymer, polyimide, AlSi) or sensor-specific packaging to reduce temperature sensitivity . Standard or specialized FBGs from suppliers such as Connet, DK Photonics, and Greitlex Photonics vary depending on type and application:

• Chirped FBGs for dispersion management or high-power laser systems can command higher prices due to complex fabrication and high-performance requirements .
• Wavelength locker FBGs for laser stabilization, with narrow FWHM bandwidths (0.1–0.8 nm) and high reflectivity (2–20%), are precision-engineered and may include athermal packaging for temperature stability, which can influence cost .
• Apodized or phase-shifted FBGs for WDM filtering or single-frequency lasers are specialized and typically priced higher due to their precise spectral characteristics .

Factors Affecting Quotation

1. Grating Type: Uniform, chirped, apodized, or phase-shifted FBGs. Chirped and phase-shifted gratings are more expensive due to complex fabrication.
2. Wavelength Range and Accuracy: Custom wavelengths or tight tolerances (±0.02 nm) increase cost.
3. Length and Reflectivity: Longer gratings or higher reflectivity specifications require more material and precise inscription.
4. Packaging: Athermal or sensor-specific packaging for environmental stability adds to the price.
5. Production Volume: Small series runs are more expensive per unit, while high-volume production can reduce per-unit cost .

Example Quotation Scenario

• Custom FBG: 1550 nm, ±0.2 nm accuracy, 1 nm linewidth, polymer-coated, three samples
• Estimated Cost: $1,250 setup fee
• Optional Add-ons: Athermal packaging (+$100–$300 per unit), high-reflectivity coating (+$50–$150 per unit) For high-performance or specialized applications, contacting suppliers directly with specifications is recommended to obtain an intelligent, tailored quotation that accounts for wavelength, grating type, packaging, and volume requirements .