BP1064-5 Bandpass Filter(CWL=1064nm,FWHM=5nm)

Specifications

• Part Number: BP1064-5 (Commonly associated with manufacturers like SyronOptics, OptoSigma, or similar precision optics vendors).
• Center Wavelength (CWL): 1064 nm (Infrared/NIR).
• Bandwidth (FWHM): 5 nm (Narrow band, allowing only 1064 nm ± 2.5 nm to pass).
• Transmission (T): >90% (High throughput at the peak wavelength).
• Blocking: OD5 @ 200–1800 nm.

Applications - Raman Spectroscopy

Used to "clean" the excitation laser line (preventing side-modes) or, less commonly for this specific part, to collect the Rayleigh scattered light (though a notch filter is usually used to block it).

Recommended Light Sources

To utilize this filter effectively, you must use a light source that emits precisely at 1064 nm. A broadband source would be inefficient as the filter would reject >99% of the light.

• Nd:YAG Lasers: The most common source. 1064 nm is the primary fundamental emission line of Neodymium-doped Yttrium Aluminum Garnet lasers.
• Yb-Doped Fiber Lasers: Ytterbium fiber lasers can be tuned or designed to emit at 1064 nm and are often used in industrial engraving and marking.
• Nd:YVO4 Lasers: Another solid-state crystal (Yttrium Orthovanadate) that emits at 1064 nm, often used for stable, continuous-wave applications.
• 1064 nm LEDs / SLEDs: Super-luminescent Diodes (SLEDs) or specific NIR LEDs can be used for lower-power imaging applications, provided their spectral output overlaps significantly with the 5 nm passband.

Specifications

• Part Number: BP1064-5 (Commonly associated with manufacturers like SyronOptics, OptoSigma, or similar precision optics vendors).
• Center Wavelength (CWL): 1064 nm (Infrared/NIR).
• Bandwidth (FWHM): 5 nm (Narrow band, allowing only 1064 nm ± 2.5 nm to pass).
• Transmission (T): >90% (High throughput at the peak wavelength).
• Blocking: OD5 @ 200–1800 nm.

Application - Biomedical Imaging

For photoacoustic imaging or fluorescence microscopy where 1064 nm is the excitation wavelength, and deep blocking of other wavelengths is required to protect the sample or detector.

Recommended Light Sources

• For Photoacoustic Imaging (PAI) - Q-Switched (Pulsed) Nd:YAG Laser

Why: Photoacoustic imaging relies on the photoacoustic effect, where light is absorbed and converted into sound waves via rapid thermal expansion. This requires high-energy, nanosecond pulses (typically 5–10 ns pulse width) which only a Q-switched laser can provide. A continuous wave (CW) source would simply heat the sample slowly without generating the acoustic pressure wave needed for imaging.

• For Fluorescence Microscopy (NIR-II / SWIR) - Continuous Wave (CW) or Mode-Locked Nd:YAG / Fiber Laser

Why: Fluorescence typically requires a steady stream of photons to continuously excite the fluorophores (dyes or nanoparticles). A CW Nd:YAG or an Yb-doped Fiber Laser provides the stable, high-intensity illumination needed to excite NIR-II probes (like Ag₂S quantum dots or organic dyes).