aeroGAIN-ROD – high-power ytterbium rod fiber gain modules

The aeroGAIN-ROD module is the ultimate high-power fiber amplification module for ultrafast pulsed lasers. With its 3300 µm2 mode field area and high pump absorption, it gives you a power handling previously only available in solid-state configurations.

The rugged aluminum body makes the module easy to handle and mount for OEM integration and scientific laboratory setups.

Key Features

Diffraction-limited beam quality

High peak power damage threshold

­Compact format

High NA pump cladding

Optimized for 1030-1040 nm range

 PM and non-PM amplification

Models and options

aeroGAIN-ROD 2.1
aeroGAIN-ROD 2.1
Signal core diameter ≈ 85 µm
Pump cladding diameter 260 µm ± 15 µm
Mode field diameter: 65 µm ± 5 µm

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Get in touch with one of our fiber experts

Real single-mode amplification

The aeroGAIN-ROD modules offer true single-mode amplifications at power levels previously reserved for multimode systems. True single-mode amplifications have a range of advantages compared to multimode systems:

  • Better output stability
  • Excellent beam quality
  • No need for tight coiling

The excellent mode quality and easy coupling make the aeroGAIN-ROD module an ideal gain medium for high-power amplifiers. The rugged aluminum body makes the module easy to handle and mount for OEM integration and scientific laboratory setups.

Integrated water cooling with quick coupling ensures efficient thermal management and a long maintenance-free lifetime of thousands of hours.

The pump light is guided by our proven air-clad technology, with high reliability, high damage threshold, and large NA. The modules come standard with high-power AR-coated end-caps.

Want more details?

If you want more details about typical performance and how to couple signal and pump light, we have some application notes for you.

Read more about test procedures and typical performance when you use the aeroGAIN-ROD 2.1 for amplifying ps pulses in a single-pass configuration.

Learn how to couple signal and pump light to and from a simple reverse-pumped amplifier based on an aeroGAIN-ROD fiber.


Choose model:
aeroGAIN-ROD 2.1
Signal core diameter
≈ 85 µm
Signal wavelength
1030-1040 nm
Pump cladding NA (FWHM @ 950 nm)
≥ 0.50
Gain fiber length
804 mm ± 3 mm
Cladding absorption @ 915 nm
5 dB ± 0.7 dB
Cladding absorption @ 976 nm
≈15 dB (nominal)
PER, typical1)
≥15 dB
Typical optical efficiency1)
Beam quality, typical
M2 ≤ 1.3
Mode field diameter
65 ± 5 µm
Signal average power
≤ 100 W
Pump cladding diameter
260 ± 15 µm

1) Seed level 5 W @ 1030 nm, 80 cm rod length, 976 nm pumping

aeroGAIN-ROD 2.1
Dimensions (WxLxH)
35x 817 x 35.2 mm
2.5 kg
End-cap length
5 mm
End-cap diameter
6 mm
End-cap coating R@ 1030 nm
≤ 0.2%
End-cap coating R@ 976 nm
≤ 0.3 %
End-cap angle, input
≤ 0.5°
End-cap angle, output
2° ± 0.7°
Optical height
25 mm
aeroGain-ROD 2.1
Water cooling connection
8 mm x 1/4” BSPP
Recommended water flow1)
>1 L/min
Recommended water temperature1)
Operating temperature
+20 to +30°C (ambient)
Storage temperature
-20°C to +60°C

1) We recommend using DI water containing an anticorrosive additive to protect the aluminum cooling circuit. Required
water flow and water temperature depending on the actual optical system parameters.