Sapphire Laser Window | High‑Power Sapphire Optical Window from Felix Glass

group nameSapphire Optical Windows
Min Order1 bag
brand nameFELIX GLASS optical glass Manufacturing base
modelFG-SLW-032
payment methodL/C, D/A, D/P, Western Union, T/T
update timeMon, 24 Aug 2026 16:09:41 GMT

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Paramtents

Material Optical‑grade single‑crystal sapphire
Crystal Orientation C‑plane, A‑plane, R‑plane by review
Dimension Round, square, rectangular or drawing-based
Tolerance Drawing-dependent; critical dimensions reviewed
Surface Quality Commercial to optical scratch-dig specification
Surface Flatness Project-specific at agreed test wavelength
Transmission Band Typical uncoated material range: approx. 0.2-5.5 um
Coating Uncoated, AR, BBAR or custom by review
MOQ Prototype and batch quantities reviewed
Custom Service OEM & ODM, drawing‑to‑part manufacturing
Application High‑power laser, LiDAR, medical laser, aerospace, semiconductor, underwater ROV optics

Packging & Delivery

Min Order1 bag

Briefing

sapphire laser window, durable sapphire optical window for UV‑NIR‑MIR high‑power laser systems. Custom size, AR coating,

Detailed

Custom Sapphire Laser Window | AR‑Coated High Power Optical Window | Hong Kong Felix Optical Glass Co., Limited

Sapphire laser window single crystal optical component

Multiple size sapphire laser optical windows

AR anti‑reflection coated sapphire laser window

Custom shapes sapphire window round square octagonal

Custom Sapphire Laser Window

SKU: FG‑SLW‑001 | Manufacturer: Hong Kong Felix Optical Glass Co., Limited

Our sapphire laser window is fabricated from synthetic single‑crystal sapphire Al₂O₃. Featuring ultra‑high hardness, outstanding thermal‑shock resistance and high laser‑induced damage threshold. Available with uncoated, single‑wavelength AR or broadband AR coating. Custom dimensions, shapes and crystal orientation for high‑power industrial laser, LiDAR, medical laser, aerospace and underwater optical systems.

Request Custom Quotation

Key Product Benefits

Mohs 9 ultra‑hard substrate, strong scratch & impact resistance
Excellent thermal conductivity, resist thermal cracking under high‑power CW / pulsed laser
Broad transmission: 170 nm deep‑UV up to 5.5 µm mid‑infrared
High LIDT for high‑energy laser operation
Multiple AR anti‑reflection coating options
Fully custom geometry: round, square, wedged, mounting holes per drawing

Product Detailed Description

Sapphire laser window is a critical protective optical element widely adopted in demanding laser systems. Different from ordinary fused silica optical glass, single‑crystal sapphire delivers superior mechanical strength, thermal stability and chemical inertness, solving common pain‑points such as window scratching, thermal fracture and short service life under harsh working environments.

Hong Kong Felix Optical Glass Co., Limited performs full in‑house manufacturing workflow: raw sapphire crystal selection, precision cutting, grinding, ultra‑precision optical polishing, strict cleaning, optical coating and final metrology inspection. Every sapphire laser optical window can be customized according to customer mechanical drawings and optical requirements.

Core Material Properties of Sapphire Substrate

Parameter	Value
Spectral Transmission	170 nm ~ 5.5 µm
Mohs Hardness	9
Melting Point	2030 °C
Thermal Conductivity(c‑axis)	~35 W/(m·K)
Density	3.98 g/cm³
Max Continuous Working Temperature	1500 °C
Chemical Resistance	Inert to most chemicals(except hot phosphoric acid)

Available Coating Options

Uncoated: Broad‑band general application, zero risk of coating failure under extreme temperature.
Single‑wavelength AR Coating: Optimized for 1064 nm,532 nm,355 nm,266 nm etc, average reflectivity <0.2%.
Broadband AR Coating: UV‑VIS‑NIR multi‑wavelength anti‑reflection coating for multi‑band laser equipment.
Wedged window coating: Eliminate etalon interference for beam‑sampling laser optics.

Typical LIDT for coated sapphire laser window: 5‑20 J/cm² @10 ns pulse. LIDT test report can be supplied for high‑energy laser projects upon request.

Technical Specifications

Specification Item	Customizable Standard Range
Substrate	Synthetic single‑crystal sapphire Al₂O₃
Size Range	3 mm‑300 mm (round / square / special shape)
Thickness	0.3 mm‑25 mm
Dimensional Tolerance	±0.05 mm(tighter tolerance optional)
Surface Flatness	λ/2 ~ λ/10 ..........8 nm
Surface Quality	60‑40,40‑20 MIL‑PRF‑13830
Parallelism	≤3 arcmin; high‑precision ≤10 arcsec optional
Wedge Angle	0‑5 degrees customizable
Crystal Orientation	C‑plane / A‑plane / R‑plane custom
Edge Treatment	Fine‑ground, chamfer, polished edge
Mounting Feature	Through‑holes, counter‑sink holes, notches

Typical Applications

High‑power fiber laser, Nd:YAG, excimer laser cutting, marking & micro‑processing equipment
Automotive & airborne LiDAR protective optical window
Surgical & aesthetic medical laser devices
Laboratory high‑energy femtosecond laser systems
Semiconductor wafer inspection chamber viewports
ROV underwater laser imaging & detection systems
Aerospace UV‑MIR optical systems with wide temperature variation

Sapphire vs Fused Silica Window Material Comparison

Performance	Sapphire Laser Window	Fused Silica Window
Mohs Hardness	9, excellent scratch‑resistance	5.5‑6.5, easy to scratch
Max Working Temperature	Up to 1500°C	~1000‑1100°C
IR Transmission Cut‑off	~5.5 µm	~3.5 µm
Thermal‑Shock Resistance	Excellent	Good, inferior to sapphire
Birefringence	Yes(crystal‑orientation controllable)	None(isotropic glass)
Ideal Scenarios	High‑power, high‑temp, wear‑prone environment	Deep‑UV, low‑medium power, cost‑sensitive projects

Suggestion: Choose sapphire for hundreds‑watt‑and‑above continuous‑wave laser or abrasive / high‑temperature working conditions.

Frequently Asked Questions

Q: Should I select sapphire or fused silica laser window?

A: Pick sapphire for high‑power laser, high‑temperature or abrasion‑prone environment. Fused silica fits deep‑UV, low‑to‑medium‑power cost‑oriented applications.

Q: Can you deliver LIDT test report for sapphire laser window?

A: Yes, test reports including LIDT, interferometer flatness, transmission spectrum are available on request, extra lead‑time applies.

Q: Can sapphire laser window be machined with mounting holes?

A: Yes, we process through‑holes, counter‑sink holes and notches based on customer drawings.

Q: What crystal orientation options do you support?

A: C‑plane, A‑plane, R‑plane sapphire substrates for polarization‑sensitive laser systems to manage birefringence impact.

Submit Custom Requirement

Please provide dimension, target wavelength, coating requirement, quantity and drawing. Hong Kong Felix Optical Glass Co., Limited will respond within 24 working hours.