Two New Stable Wavelength F Mount Laser Diodes With FAC Technology

 

3W 808nm F Mount Laser Diode Wavelength stabilization

Our 3W 808nm F Mount laser diode features excellent wavelength stabilization, ensuring minimal wavelength drift for consistent and reliable performance in precision applications. With a stable wavelength output, it provides superior consistency under varying temperature and operating conditions.

Equipped with a Fast Axis Collimation (FAC) lens, this laser diode delivers a well-collimated linear beam profile, enhancing coupling efficiency and improving beam quality for downstream optics and systems.

Ideal for applications in medical devices, industrial processing, and scientific research, this 3W 808nm F Mount laser diode combines stable wavelength control with optimized beam shaping for dependable and efficient operation.

Key Features:

• Output Power: 3 Watts of continuous-wave (CW) laser emission at 808nm wavelength
• Wavelength Stabilization: Maintains consistent wavelength output under variable temperatures and operational environments, ensuring precision
• FAC (Fast Axis Collimation): Produces a linear, well-collimated beam with reduced divergence for enhanced coupling efficiency
• F Mount Package: Standardized and rugged housing for easy installation and mechanical stability
• Long Lifetime and Reliability: Built with high-quality semiconductor materials and strict quality control to ensure long-term stable operation

Typical Applications:

• Medical Equipment: Widely used in phototherapy, laser surgery, and medical diagnostics where stable, reliable laser sources are essential
• Industrial Processing: Suitable for materials processing such as laser welding, cutting, and marking that require precise laser power and beam control
• Scientific Research: Ideal for laboratory experiments and instrumentation where consistent wavelength and beam quality impact experimental results
• Optical Pumping: Used as pump sources for fiber lasers and amplifiers due to its stable output and beam quality
• Sensing and Measurement: Employed in optical sensors and measurement devices requiring stable wavelength and beam profile for accurate data
• In summary, the 3W 808nm F Mount Laser Diode with wavelength stabilization and FAC is a versatile, high-quality laser source designed to meet demanding requirements across various industries. Its combination of stable wavelength output, superior beam quality, and user-friendly packaging makes it an excellent choice for precision laser applications.

Principle of Wavelength Stabilization for Laser Diodes：

The emission wavelength of a laser diode is influenced by multiple factors such as temperature, drive current, and manufacturing variations. Wavelength stabilization aims to maintain the laser's output wavelength within a very narrow range, minimizing wavelength drift caused by environmental changes. This stability is critical for applications requiring high precision and consistent optical performance.

• Common Methods of Wavelength Stabilization:

Temperature Control (Thermal Compensation):
Since the emission wavelength shifts with temperature, integrated temperature sensors and thermoelectric coolers (TEC) are used to maintain a constant laser operating temperature. This helps keep the wavelength stable despite external temperature fluctuations.

External Cavity Feedback:
Adding optical components like diffraction gratings or filters outside the laser diode forms an external cavity that selectively reflects certain wavelengths. This feedback restricts lasing to a narrow wavelength range, reducing wavelength drift. Such designs are typical in narrow linewidth lasers.

Integrated Wavelength-Selective Elements:
Laser diodes can incorporate built-in wavelength-selective structures such as Distributed Feedback (DFB) gratings or Distributed Bragg Reflectors (DBR). These structures inherently stabilize the emission wavelength by favoring oscillation at a specific wavelength.

Drive Current Regulation and Feedback Control:
The laser's drive current affects the emission wavelength. Real-time monitoring and adjustment of the current can be used to fine-tune and stabilize the wavelength output.

• Importance of Wavelength Stabilization:

Improved System Accuracy and Repeatability:
Maintaining a stable wavelength ensures consistent spectral characteristics, essential for high-precision measurement, communication, and research applications.

Enhanced Product Reliability:
Unstable wavelengths can cause system errors or degraded performance. Wavelength stabilization prevents these issues, increasing reliability.

Better Coupling Efficiency and Power Stability:
Stable wavelength facilitates efficient coupling with optical fibers or other components, ensuring optimal system performance.

15W 878nm F Mount Laser Diode With FAC stable Wavelength

The 15W 878nm F Mount Laser Diode is engineered for high precision and reliability in demanding laser applications. Featuring advanced wavelength stabilization technology, it maintains a highly consistent output with a wavelength deviation of only ±1nm, ensuring superior stability even under fluctuating temperatures and long-term operation.

Integrated with a Fast Axis Collimation (FAC) lens, this laser diode delivers a high-quality linear beam profile, significantly reducing beam divergence and enhancing coupling efficiency. The linear beam shape makes it ideal for applications requiring precise beam control and focused energy delivery.

Housed in a robust F Mount package, the diode offers easy integration, excellent thermal management, and stable mechanical performance, making it suitable for continuous high-power operation.

Features:

• Wavelength Stabilization (±1nm):
• Advanced wavelength stabilization technology ensures excellent spectral consistency, minimizing wavelength drift during operation and providing reliable performance for wavelength-sensitive applications.
• High Output Power (15W):
• Delivers stable continuous-wave output up to 15 watts, suitable for both high-power and precision-demanding applications.
• FAC (Fast Axis Collimation):
• Integrated FAC lens produces a linear, well-collimated beam, significantly improving beam quality, reducing divergence, and increasing coupling efficiency into fibers or optical systems.
• High Efficiency:
• Optimized design provides high electrical-to-optical conversion efficiency, lowering heat load and improving overall system efficiency.
• Excellent Beam Quality:
• Linear beam shape ideal for precise focusing, fiber coupling, and uniform energy distribution.
• Compact and Rugged F Mount Package:
• Robust mechanical housing ensures easy integration, excellent thermal management, and long-term operational stability under continuous high-power conditions.
• Reliable Performance Under Temperature Variations:
• Stable output even under changing environmental or operational temperatures, reducing the need for frequent recalibration.
• Long Lifetime & High Reliability:
• Built with high-quality semiconductor materials and strict quality control processes, ensuring long service life and consistent performance.

Applications:

• Fiber Laser Pumping:
• Ideal pump source for Yb-doped and other fiber laser systems requiring precise 878nm wavelength for optimal absorption and efficient pumping.
• Semiconductor Processing:
• Used in microelectronics manufacturing for processes such as annealing, dicing, and bonding where stable laser parameters are critical.
• Medical and Aesthetic Lasers:
• Applied in laser surgery, dermatology, and aesthetic treatments where high stability and reliable output ensure treatment precision and safety.
• Scientific Research:
• Supports laboratory experiments and high-precision optical setups requiring stable wavelength and consistent optical power.
• Industrial Manufacturing:
• Suitable for laser soldering, materials processing, and precision welding applications that demand stable and efficient laser sources.
• Spectroscopy and Sensing:
• Used in optical sensing and spectroscopy systems where narrow wavelength tolerance and stable output improve detection accuracy.

Principle of FAC (Fast Axis Collimation)

What is FAC?
FAC (Fast Axis Collimation) is a beam-shaping technology used to collimate the highly divergent fast axis of a laser diode output. Since semiconductor laser diodes naturally emit highly elliptical beams (due to different divergence angles along fast and slow axes), FAC helps correct the fast axis divergence, making the beam more manageable for coupling, focusing, or further shaping.

Why is FAC necessary?

Laser diodes typically have:

Fast axis divergence: ~30°–40°

Slow axis divergence: ~8°–12°

Without FAC, the fast axis beam spreads rapidly, making it very difficult to collimate or focus efficiently.

FAC lenses, usually small cylindrical lenses, are placed extremely close to the laser facet (often <1mm), collimating the fast axis into a parallel beam.

Types of FAC Shaping

1. Linear FAC (Line-Shaped Beam)

Principle:
The FAC lens collimates only the fast axis, while the slow axis remains naturally divergent or is collimated separately. The resulting beam profile is linear (a narrow line shape).

Beam shape:
Long and narrow - essentially a thin, straight line.

Advantages:

Very high coupling efficiency into fiber cores (especially for fiber-coupled lasers)

Simplifies downstream beam shaping

Preferred for pumping, fiber coupling, and applications needing narrow stripes of light

Typical applications:
Fiber pumping, medical lasers, materials processing

2. Square FAC (Square-Shaped or Symmetrical Beam Shaping)

Principle:
In addition to fast axis collimation, the slow axis is also shaped (sometimes using SAC - Slow Axis Collimation or micro-optics arrays) to create a square or nearly circular beam profile.

Beam shape:
More symmetrical - square-like or nearly round spot.

Advantages:

Easier beam focusing into circular spots for direct applications

Better for free-space applications where symmetrical beam quality is required

Simplifies integration into some scanning or processing systems

Typical applications:
Direct material processing, laser soldering, free-space illumination, aesthetic & medical devices

Summary Table