1080nm Bandpass Filter (Nd:YAP)

Operating in the near-infrared (NIR) spectral region, 1080nm light exhibits excellent atmospheric penetration, low biological tissue absorption, and a relatively safe laser radiation threshold, making it ideal for applications requiring deep penetration and minimal interference.

  • Application 1: (LiDAR Systems) In light detection and ranging (LiDAR) technology, a 1080nm bandpass filter precisely isolates the target wavelength, eliminating ambient light noise to enable high-fidelity capture of reflected laser signals. This enhances distance measurement accuracy by ensuring sensitive detection of weak return signals in complex environmental conditions.
  • Application 2:  (Fiber Optic Communications) Within wavelength division multiplexing (WDM) systems, the filter selectively transmits the 1080nm channel while suppressing adjacent wavelengths, mitigating crosstalk in high-density optical networks. This critical function maintains signal integrity for high-speed data transmission over long-haul fiber links.
  • Application 3:  (Biomedical Sensing) For non-invasive medical diagnostics such as glucose monitoring or fluorescence-guided imaging, the filter leverages the tissue-penetrating properties of 1080nm light to isolate the optimal spectral band. By rejecting visible light and extraneous NIR noise, it improves signal-to-noise ratios in biosensor applications, enabling more reliable physiological parameter measurement.
1080nm Bandpass Filter (Nd:YAP)
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Center Wavelength (nm)
FWHM (nm)
Optical Density(OD)

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Center Wavelength (nm)
FWHM (nm)
Optical Density(OD)
US 10374379 B2 - Systems and methods for laser amplification

US 10374379 B2 - Systems and methods for laser amplification

Context: High-power fiber amplifier systems used in telecommunications or directed energy.

Usage of Filter: The bandpass filter is placed between the "seed" laser (the master signal) and the amplification stages.

Function: It acts as an ASE Suppressor (Amplified Spontaneous Emission). Ytterbium fibers want to emit light across a broad range (1030–1100 nm). If the user wants a pure 1080 nm beam, this filter strips away the "noise" (ASE) at 1030 nm or 1064 nm before the light enters the main amplifier.

Result: Parasitic Lasing Prevention. It ensures that the amplifier dumps all its energy into the desired 1080 nm signal rather than wasting power amplifying background noise, which could otherwise damage the system.

US 7957077 B2 - Laser protective eyewear having improved glare reduction

US 7957077 B2 - Laser protective eyewear having improved glare reduction

Context: Safety goggles for operators working with high-power industrial fiber lasers (which typically emit between 1060–1080 nm).

Usage of Filter: The filter is an absorptive dye or interference stack embedded directly into the polycarbonate lens material.

Function: It acts as a High-OD (Optical Density) Notch Filter. While the patent discusses balancing colors, its primary safety function is to provide an Optical Density of >4 (blocking 99.99% of light) specifically covering the 1080 nm danger zone.

Result: Retinal Safety. It allows the operator to see visible light (blue/green/red) to operate machine controls while completely blocking the invisible 1080 nm scattered light that could instantly burn the retina.

US 11936157 B2 - Laser device for Coherent Raman Scattering CARS

US 11936157 B2 - Laser device for Coherent Raman Scattering (CARS)

Context: A sophisticated dual-laser system used for CARS microscopy, a technique that allows researchers to "see" chemical bonds (like lipids in cells) without using fluorescent dyes.

Usage of Filter: The filter is placed at the output of a Ytterbium (Yb) fiber laser arm to spectrally clean the pulse.

Function: It acts as a Stokes Beam Shaper. In CARS, you need two laser beams with a precise frequency difference. This filter forces the Ytterbium laser to output a clean, narrow signal exactly at 1080 nm (acting as the "Stokes" beam), which is then synchronized with a second laser.

Result: High-contrast chemical imaging. By precisely locking the 1080 nm wavelength, the system can vibrate specific molecules (like Carbon-Hydrogen bonds), creating bright images of cell structures that would otherwise be invisible.

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