II-VI Zinc Selenide partial reflector output coupler CO2 laser

Product Description

Pristine II-VI Zinc Selenide (ZnSe) Partial Reflector Output Coupler for High-Power CO2 Lasers

Elevate your CO2 laser system with this exceptional, vintage II-VI (now Coherent) ZnSe partial reflector output coupler, meticulously crafted for precision performance in demanding infrared applications. Manufactured in 1994, this optic remains in very pristine condition, with no scratches, chips, or degradation—ready for immediate integration into your laser resonator setup.

Measuring 25.4 mm in diameter and 3 mm thick, it’s a zero-power meniscus design that combines durability with optical excellence, making it ideal for high-stakes environments where reliability is paramount. This rare configuration is not easily sourced in surplus markets, offering significant savings over new equivalents that can exceed $1,000 from specialized suppliers.

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Key Specifications

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Material & Design Advantages

Laser-Grade Zinc Selenide (ZnSe) :

• Superior transmission in the mid-IR spectrum (0.6–22 µm)

• Ultra-low absorption (<0.25%) at 10.6 µm, ensuring minimal thermal distortion even under kilowatt-level power loads

• High refractive index (~2.4) enables zero-power meniscus design where curvatures cancel net optical power

Zero-Power Meniscus Design:

• Provides aberration-free performance without altering beam focus

• Perfect for stable, long-cavity resonators

• Gentle 4‑meter radius of curvature is a specialized feature for optimized beam propagation in custom setups

Power Handling:

• Capable of withstanding up to 3 kW per mm of beam diameter in CW or pulsed modes

• Excellent thermal conductivity prevents lensing or failure in high-energy operations

Coating Quality:

• Surface 1 (concave) provides partial reflection – actual measured 85% at 10.6 µm

• Surface 2 (convex) features AR coating (<0.5% reflection) to minimize losses and ghosting for maximum beam efficiency

• Coatings validated to stringent standards including adhesion, thermal cycling, and abrasion per MIL-C-675C

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Orientation & Handling

The edge arrow points to S1 (the concave side) , which should face the laser cavity. This clear marking ensures easy, error-free installation.

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Applications

Industrial Manufacturing:

• Precision laser cutting, welding, engraving, and marking of metals, plastics, textiles, and ceramics

• Enabling clean, high-speed processes in automotive, aerospace, and electronics production

Medical and Surgical Tools:

• CO2 lasers for minimally invasive procedures like dermatology, ophthalmology, and tissue ablation

• Low-loss optics ensure consistent power delivery and patient safety

Scientific Research and Defense:

• Spectroscopy, remote sensing, LIDAR, and high-energy experiments requiring stable, high-power IR beams without optical degradation

Material Processing:

• Additive manufacturing, heat treatment, and surface modification in R&D labs

• Pristine condition supports repeatable results in controlled environments

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Condition

PRISTINE – UNUSED
STORED AND HANDLED WITH CARE
NO VISIBLE SCRATCHES, CHIPS, OR COATING DAMAGE
OPTICAL SURFACES: CRYSTAL CLEAR, COATING INTACT
EDGE ARROW CLEARLY LEGIBLE
ACTUAL 85% REFLECTIVITY CONFIRMED BY ACCOMPANYING LABEL
READY FOR IMMEDIATE INTEGRATION

⚠ HANDLING NOTE: This is a precision optical component with delicate AR coatings. Handle only by edges with clean gloves. Never touch coated surfaces. Store in clean, dry environment when not in use.