RealLight MCD Series 350 ps Microchip Laser

Overview

The RealLight MCD Series 350 ps Microchip Laser is a compact, passively Q-switched, diode-pumped solid-state (DPSS) laser engineered for precision ultrafast applications requiring high temporal fidelity and excellent beam quality. Based on monolithic microchip architecture—where the gain medium (Nd:YAG or Nd:YVO₄) and saturable absorber (e.g., Cr⁴⁺:YAG) are bonded into a single optically polished crystal—the MCD platform delivers transform-limited picosecond pulses with negligible pulse tailing and exceptional shot-to-shot energy stability. At 266 nm, this fourth-harmonic output is generated via cascaded nonlinear frequency conversion (1064 nm → 532 nm → 266 nm) within a hermetically sealed, alignment-free laser head. Its integrated semiconductor pump module and monolithic resonator eliminate mechanical drift and thermal lensing sensitivity, making it suitable for OEM integration in demanding environments including vacuum chambers, airborne platforms, and automated analytical instruments.

Key Features

• Ultra-short pulse width of 350 ps at 266 nm—optimized for time-resolved spectroscopy and nonlinear excitation
• TEM₀₀ spatial mode with M² < 1.1 and full-angle divergence ≤ 8 mrad (1/e²), enabling efficient coupling into fibers and nonlinear crystals
• High polarization extinction ratio (>100:1), critical for polarization-sensitive measurements such as SHG microscopy or ellipsometry
• Stable pulse energy output (±3% over 8 hours) under constant ambient conditions—validated per ISO 11554 for laser beam parameter stability
• Compact, fully sealed laser head (45 × 30 × 120 mm) designed for embedded integration; no external cooling or water lines required
• Dual triggering capability: internal free-running mode or external TTL synchronization (rising-edge sensitive, jitter < 1 ns)
• OEM-ready architecture—including optional seed-source driver circuit board with adjustable delay, pulse selection, and RS232/USB programmable parameters
• Optional built-in beam expansion optics to reduce divergence to < 2 mrad (full angle, 1/e²), supporting long-working-distance optical setups

Sample Compatibility & Compliance

The MCD-266 variant is compatible with standard UV-grade fused silica optics, MgF₂-coated mirrors, and BBO/LBO nonlinear crystals used in harmonic generation and parametric amplification. Its 266 nm output meets spectral requirements for laser-induced breakdown spectroscopy (LIBS), resonance-enhanced multiphoton ionization (REMPI), and time-of-flight mass spectrometry (TOF-MS) ion sources. The system complies with IEC 60825-1:2014 Class 4 laser safety standards and includes interlock-ready connectors for integration into certified laboratory enclosures. Firmware supports audit-trail logging of operational parameters (pulse count, temperature, voltage) to meet GLP/GMP documentation needs where applicable. No hazardous substances are used in construction per RoHS Directive 2011/65/EU.

Software & Data Management

RealLight provides the MCD Control Suite—a cross-platform application (Windows/macOS/Linux) that communicates via USB virtual COM port or RS232. Users can configure repetition rate (fixed at 0.1 kHz for this model), enable/disable external trigger, monitor real-time diode current and thermistor readings, and log timestamped pulse energy statistics. All configuration changes are non-volatile and persist across power cycles. The SDK includes C/C++ and Python APIs with full documentation, enabling seamless integration into LabVIEW, MATLAB, or custom DAQ systems. Data export conforms to CSV and HDF5 formats for compatibility with scientific analysis pipelines compliant with ASTM E2500 and ISO/IEC 17025 traceability frameworks.

Applications

• Laser Ionization Sources: Stable 266 nm pulses serve as robust photoionization triggers in TOF-MS and atmospheric pressure ionization systems, minimizing fragmentation while maximizing signal-to-noise ratio
• Nonlinear Optical Characterization: High peak power (>10 MW) enables efficient third- and fourth-harmonic generation, sum-frequency mixing, and UV-Raman excitation in condensed-phase samples
• Laser-Induced Fluorescence (LIF): Sub-nanosecond timing resolution supports lifetime measurements in biological fluorophores (e.g., tryptophan, NADH) and quantum dots
• Microfabrication & Surface Structuring: Precise ablation thresholds on polymers, thin-film metals, and dielectrics—ideal for maskless direct-write patterning without thermal damage zones
• LIBS Standoff Detection: Integrated into portable spectrometers for elemental analysis of soils, alloys, and cultural heritage artifacts under ambient conditions
• Seed Source for Amplifier Systems: Synchronized injection seeding of regenerative amplifiers (e.g., Ti:sapphire or Yb-doped fiber) for chirped-pulse amplification (CPA) architectures

FAQ

Is the MCD-266 laser certified for use in medical devices?
The MCD series is not FDA-cleared or CE-marked as a medical device. However, its design adheres to IEC 62304 software lifecycle requirements and IEC 60601-1 general safety principles—supporting integration into Class IIa/IIb diagnostic or therapeutic systems under OEM responsibility.

Can the laser head be operated in vacuum?
Yes—the hermetically sealed microchip cavity and absence of outgassing adhesives or lubricants allow operation in low-to-high vacuum environments (10⁻⁶ mbar range), provided thermal management is externally maintained within 15–35 °C.

What is the expected lifetime of the laser crystal and pump diode?
Based on accelerated life testing per Telcordia GR-468-CORE, the Nd:YVO₄/Cr⁴⁺:YAG chip exhibits >2 billion shots at rated energy; the pump diode has a median lifetime of >15,000 hours at 25 °C case temperature.

Does RealLight offer wavelength customization beyond the standard MCD variants?
Custom harmonic generation paths (e.g., 213 nm via fifth-harmonic generation) and tailored pulse energy/repetition rate combinations are available under NDA-supported engineering collaboration, subject to nonlinear crystal availability and thermal management validation.