Posted in | Ion Lasers

Stretto External Cavity Diode Lasers

The revolutionary Stretto, a vital member of the PureLight family, offers cutting-edge, high-performance narrow linewidth photonic solutions. Named after the musical term “stretto,” this novel tunable laser is renowned for its accuracy and complexity. Its narrow linewidth and exceptional performance are reminiscent of the intricate concepts of quantum entanglement.

Versatile and Scalable Wavelength Range

Stretto's exceptional ability to cover wavelengths from UV to infrared sets it apart in the quantum technology market. This feature is crucial for scientists and OEMs aiming to integrate systems or scale their quantum experiments without the need for redesign. Its versatility makes Stretto an excellent choice for tunable laser technology.

Designed for Durability and Easy Integration

Stretto prioritizes manufacturability with its semi-automated manufacturing process, ensuring easy OEM integration and efficient volume production scaling. This makes Stretto the preferred laser choice for sectors demanding extreme reliability and precision.

Unrivaled Performance in Harsh Environments

Stretto is not the typical external cavity diode laser (ECDL); rather, it was created with Daylight’s commitment to high performance and quality of light. This solution is lightweight, portable, and durable, designed to endure harsh environments. Unlike conventional ECDLs, Stretto performs exceptionally well in environments that challenge other lasers, setting a new standard in rugged laser technology.

Stretto's hermetically sealed design makes it perfect for use in various conditions, such as dusty, humid, or vacuum-compatible settings. Even under the most extreme circumstances, its shock and vibration resistance guarantees reliable performance.

The Stretto Advantage in Quantum Systems

Key Benefits for Quantum Technology

  • Large mode-hop-free tuning range exceeding 70 GHz
  • Stable under extreme shock and vibration
  • Resistant to temperature and pressure fluctuations

Stretto is more than just a high-precision laser; it exemplifies the blend of quantum technology's versatility and advanced engineering. In the realm of tunable lasers, Stretto represents innovation, reliability, and adaptability, making it ideal for use in quantum sensors, clocks, and computing systems.

For individuals at the forefront of quantum applications and research, Stretto offers an unmatched combination of resilience, flexibility, and precision. Embrace the future of quantum technology with Stretto, the premier choice for high-precision tunable lasers.

Why Use a Laser for Quantum Technologies?

A laser is more than just a tool. Due to their unmatched accuracy, flexibility, and control, lasers are the fundamental building blocks of Quantum 2.0 scalability and quantum information technology. They are essential for quantum computing, communication, and metrology.

Precision Control for Quantum Computing

Lasers, with their unparalleled ability to control and manipulate quantum states, form the foundation of many quantum computing modalities. They provide the precision and coherence needed for the complex operations of quantum gates, enabling the initialization, modification, and readout of qubit quantum states. This is especially crucial in systems like trapped ion quantum computers, where lasers finely tune the ions' internal and motional states.

High-Speed Quantum Communication

Lasers are essential in quantum communication, enabling the fast information transfer required for advanced quantum key distribution (QKD) techniques. They also ensure high data transmission security by transporting secure quantum information over long distances through fiber optic paths or free space.

Laser Cooling and Trapping: The Key to Stability

Stable quantum state maintenance requires the ability to cool and trap particles, which lasers excel at. By lowering atoms’ temperature to almost absolute zero, methods such as laser cooling help solve two common problems with quantum systems: decoherence and environmental noise.

Scalability and Integration for Quantum Networks

Several groups have successfully showcased working prototypes across the spectrum of quantum sensing and timing, computing, and networking. The market is now ready to take its next steps, including the commercialization of products and the implementation of scalable designs.

As we advance into more complex quantum networks, lasers offer the necessary scalability and integration. Their precise tuning and targeting capabilities are perfect for individually addressing qubits in expansive quantum systems, paving the way for practical and scalable quantum computing and networking solutions.

Adaptability for Diverse Quantum Technologies

Lasers stand out for their adaptability. Their versatility in wavelengths, powers, and pulse durations makes them perfect for meeting the diverse demands of various quantum technologies. This adaptability is essential for tailoring lasers to the specific requirements of different quantum systems, including solid-state qubits, atoms, and ions.


Features and Benefits

  • Ultra-Narrow Linewidth: Achieving a free-running linewidth of 100 kHz and closed-loop linewidths of <1 kHz
  • Superior Frequency Tuning: Offering mode-hop-free tuning over >50 GHz
  • Wide Wavelength Coverage: From 369 nm to 1800 nm, with options for free space and fiber-coupled outputs
  • Ease of integration: Customers can quickly and confidently lock the Stretto to their reference thanks to its world-class current, piezo, and temperature driver noise performance and well-characterized servo behavior.


  • Optical ion traps and ionic spectroscopy
  • Defect and color center quantum sensors
  • Quantum Information Systems
  • Optical atomic traps
  • Atomic clocks

Product Specifications

Source: DRS Daylight Solutions Inc.

. .
Typical power range 10 – 300 mW (model dependent)
Typical mode-hop free tuning range  ≥ 50 GHz
Typical free-running linewidth
(5 µs integration time)
100 kHz FWHM
Typical output beam characteristics Fiber-coupled: SM/PM fiber
Free-space: Circular, 1 mm FW @ 1 e2 diameter
Typical output beam polarization Fiber coupled: > 18 dB PER
Free-space: Linear > 20 dB PER
Optical isolation 30 – 35 dB (integrated)
Dimensions laser head (H x W x D) 8.8 x 4.8 x 2.3 inches (220 x 120 x 58 mm)
Weight laser head 7 lb (3.2 kg)
Dimensions control unit (H x W x D) 11.5 x 7 x 2.3 inches (290 x 180 x 58 mm)
Weight control unit 1 lb (0.4 kg)
Power supply 100 – 240 VAC (50/60 Hz)
Power consumption Typ. < 35 W
Interface Ethernet and USB 2.0/3.0 networking
Analog servo control outputs
Windows® 10/11 GUI and full SDK
(Supports Python® / C++ / Labview®)
Environmental temperature 15 – 30°C (operating)
-40 – 70°C (storage / transport)
Environmental humidity  95% non-condensing

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