ALS-IR

• High-power, single-frequency CW laser designed for demanding precision applications.
• Optical output power of up to 130 W in the 1028–1070 nm wavelength range.
• Available across approximately 976–1950 nm, depending on configuration.
• Single-mode TEM₀₀ output with excellent beam quality.
• M² < 1.1 for high-quality spatial beam performance.
• Ultra-low intensity noise <0.01% RMS over 100 Hz–10 MHz.
• Long-term power stability <±0.5% in CP mode.
• No added phase noise from the amplification process, helping preserve the quality of the seed laser.
• All-fiber architecture provides a robust and alignment-free optical system.
• A coolerless laser head simplifies integration and reduces maintenance requirements.
• Designed for 24/7 industrial operation.
• Output power can be continuously adjusted from 1 to 100%, with a 10–100% recommended operating range.
• The optional Active Noise Reduction System (ANRS) can further suppress intensity noise.
• Optional fiber-coupled output up to 25 W with FC/APC connector.
• Optional remote control interface and signal monitoring for laser-locking applications.
• Can be configured as either a laser system or amplifier, depending on the selected seed source.

The TOPTICA ALS-IR is a high-power, single-frequency continuous-wave fiber laser and amplifier platform designed for applications where high optical power must be combined with excellent beam quality, low noise, and long-term stability.

The ALS-IR combines an all-fiber architecture with single-mode and single-frequency operation, enabling the generation or amplification of highly stable laser light to power levels that are difficult to achieve with conventional narrow-linewidth laser technologies. The system is particularly suited to demanding applications in quantum technology, precision interferometry, semiconductor metrology, and high-brightness laser pumping.

A major strength of the ALS-IR is its ability to deliver very high optical power while maintaining excellent spatial mode quality. The system provides TEM₀₀ output with M² < 1.1, allowing the high-power beam to be efficiently focused and transported through demanding optical systems.

The ALS-IR is also designed for applications where laser intensity noise can directly affect measurement performance. The standard system provides intensity noise below 0.01% RMS from 100 Hz to 10 MHz, while the optional ALS-ANRS-YB Active Noise Reduction System can reduce the noise even further. TOPTICA specifies noise levels below 0.005% RMS from 100 Hz to 10 MHz for the ANRS configuration.

Another important advantage is the all-fiber, alignment-free architecture. Unlike free-space optical amplifier systems that may require regular optical alignment, the ALS-IR is designed for hands-free operation with no routine optical alignment or maintenance. The coolerless laser head also simplifies integration into larger experimental or industrial systems.

The ALS-IR can be supplied as a fiber amplifier, where an external seed laser is amplified to high power, or as a complete laser system with an appropriate integrated seed source. This makes the platform flexible for applications that already have a narrow-linewidth seed laser or require a complete high-power laser solution.

Product Type: High-Power Single-Frequency CW Fiber Laser / Amplifier
Model: ALS-IR
Operation: Continuous Wave (CW)
Wavelength Range: 976–1950 nm*
Maximum Output Power: Up to 130 W*
Spatial Mode: TEM₀₀
Beam Quality: M² < 1.1
Free-Space Beam Diameter: 1.0 ± 0.2 mm
Single-Frequency Compatible: Yes
Long-Term Power Stability: < ±0.5%
Intensity Noise: <0.01% RMS, 100 Hz–10 MHz
Output Polarization: Vertical, >300:1
Pointing Stability: < ±2 µrad/°C
Output Power Tunability: 1–100%
Recommended Power Range: 10–100%
Input Connection: FC/APC
Fiber Output: Optional, up to 25 W
Cooling: Coolerless Laser Head / Rack Cooling
Laser Architecture: All-Fiber
Optical Alignment: Alignment-Free
Remote Control: Optional
Noise Reduction: Optional ANRS
Signal Monitoring: Optional ALS-MONITOR
Laser Class: Class 4

1. Quantum Technology

• Quantum Computing
• Quantum Sensing
• Quantum Metrology
• Quantum Optics
• Quantum Information Processing
• Atomic & Molecular Physics

The combination of high power, single-frequency operation, low noise, and excellent stability makes ALS-IR particularly suitable for demanding quantum technology systems. TOPTICA specifically identifies fundamental and applied quantum technology as key applications.

2. Precision Interferometry

• Laser Interferometry
• Precision Metrology
• Gravitational Wave Detection
• Long-Baseline Interferometry
• High-Precision Optical Measurement

TOPTICA specifically highlights high-performance instrumentation based on interferometry, including systems for gravitational-wave detection, as an ALS-IR application.

3. High-Brightness Laser Pumping

• High-Power Laser Pumping
• Fiber Laser Pumping
• Solid-State Laser Pumping
• Nonlinear Optics
• Frequency Conversion
• High-Power Photonics

The high available output power makes ALS-IR suitable as a powerful pump source for downstream optical amplification and nonlinear frequency-conversion systems.

4. Semiconductor Inspection & Metrology

• Semiconductor Inspection
• Wafer Metrology
• Optical Metrology
• Precision Measurement
• Surface Inspection

The combination of high optical power, low noise, and excellent beam quality is useful when ALS-IR is integrated into high-performance measurement systems.

5. Frequency Conversion
ALS-IR can also be used as a high-power IR source for nonlinear optical systems such as

• Second Harmonic Generation (SHG)
• Sum Frequency Generation (SFG)
• Difference Frequency Generation (DFG)
• Visible Laser Generation
• UV Laser Generation
• Nonlinear Frequency Conversion

This is particularly relevant within TOPTICA's broader high-power laser ecosystem, where ALS-IR can provide the high-power IR input required for frequency-conversion stages.