Posted in | Lasers

Stretto: Advanced External Cavity Diode Lasers

Stretto is a key member of the PureLight family, delivering cutting-edge, high-performance narrow linewidth photonic solutions. Inspired by the musical term “stretto,” this innovative tunable laser embodies precision and intricacy, reflecting the principles of quantum entanglement through its exceptional performance and narrow linewidth.

Versatile and Scalable Wavelength Range

Stretto's exceptional ability to cover wavelengths ranging from UV to infrared makes it stand out in the quantum technology market. This feature is crucial for scientists and OEMs who want to integrate systems or scale their quantum experiments without the need for redesign. Stretto’s adaptability makes it the top choice for tunable laser technology.

Engineered for Durability and Seamless Integration

With an emphasis on manufacturability, Stretto is engineered for seamless OEM integration and efficient volume production scaling, facilitated by its semi-automated manufacturing process. This design ensures that Stretto is the go-to laser solution for industries demanding high precision and reliability.

Unrivaled Performance in Harsh Environments

Built with Daylight’s unwavering commitment to light quality and high performance, Stretto is more than just an external cavity diode laser (ECDL). It is a rugged, compact, and lightweight solution designed to withstand extreme conditions. Unlike typical ECDLs, Stretto excels in challenging environments, setting a new standard in rugged laser technology.

Stretto’s hermetically sealed design makes it ideal for a variety of environments, including humid, dusty, or vacuum-compatible settings. Its resilience to shock and vibration ensures consistent performance even in the most demanding conditions.

The Stretto Advantage in Quantum Systems

Key Benefits for Quantum Technology

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

is more than just a high-precision laser; it is a testament to the fusion of advanced engineering and adaptability in quantum technology. Perfect for applications in quantum sensors, clocks, and computing systems, Stretto symbolizes innovation, reliability, and versatility in tunable lasers.

For those leading the charge in quantum research and applications, Stretto offers an unparalleled combination of flexibility, precision, and resilience. Embrace the future of quantum technology with Stretto, the ultimate choice in high-precision tunable lasers.

Why Use a Laser for Quantum Technologies?

Lasers are not merely tools; they are the backbone of quantum information technology and Quantum 2.0 scalability. Their unmatched precision, adaptability, and control make them indispensable for quantum computing, communication, and metrology.

Precision Control for Quantum Computing

Lasers form the cornerstone of various quantum computing modalities, providing unparalleled control and manipulation of quantum states. They are essential for initializing, manipulating, and reading out the quantum states of qubits. In systems like trapped ion quantum computers, lasers finely tune the internal and motional states of ions, ensuring the precision and coherence needed for sophisticated quantum gate operations.

High-Speed Quantum Communication

Lasers play a pivotal role in quantum communication by facilitating high-speed information transfer, which is crucial for advanced quantum key distribution (QKD) methods. Lasers enable secure quantum information to travel vast distances, whether through free space or along fiber optic paths, ensuring high levels of security in data transmission.

Laser Cooling and Trapping: The Key to Stability

Lasers excel in cooling and trapping particles, a vital process for maintaining stable quantum states. Techniques like laser cooling bring atoms to near absolute zero temperatures, significantly reducing environmental noise and decoherence—common challenges in quantum systems.

Scalability and Integration for Quantum Networks

Numerous teams have showcased operational models in the domains of quantum computing, networking, sensing, and timing. The market is now prepared to support the next steps, which include the commercialization of products and the application of scalable designs.

Lasers provide the necessary scalability and integration. Their precise tuning and targeting capabilities are ideal for individually addressing qubits in extensive quantum systems, paving the way for practical and scalable quantum computing and networking solutions.

Adaptability for Diverse Quantum Technologies

Lasers are distinguished by their adaptability. With a range of wavelengths, powers, and pulse durations, they are perfectly suited to meet the diverse requirements of various quantum technologies. This versatility is crucial for tailoring lasers to the specific needs of different quantum systems, from atoms and ions to solid-state qubits.


Features and Benefits

  • Ultra-Narrow Linewidth: Achieving a free-running linewidth of  100 kHz and closed-loop linewidths of < 1 kHz
  • Easy integration: World-class current, piezo, and temperature driver noise performance, combined with well-characterized servo behavior, enables customers to lock Stretto to their reference quickly and with confidence.
  • Superior Frequency Tuning: Providing 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


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

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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