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Fiber Coupled Butterfly (Single-Mode) with Isolator

The fiber-coupled single-mode butterfly with optical isolator package has specifications similar to our open beam single-mode butterfly package but has fiber polarization options. Single-mode or Polarization maintains fiber available with orientation in either a fast or slow axis. 

Designed to replace expensive DFB, DBR, fiber, and external cavity lasers, the single-mode spectrum stabilized laser offers superior wavelength stability over time, temperature, and vibration, and is manufactured to meet the most demanding wavelength requirements.

Choose a λ (nm)
Choose a Min. Power (mW)
Choose a Connector Type

Key Features

  • High-Power Single-Spatial-Mode, Single-Frequency Output
  • Ultra-Narrow Spectral Linewidth (< 100 kHz)
  • Stabilized Output Spectrum (< 0.007 nm/°C)
  • Excellent Beam Quality (M² < 1.1)
  • Integral ESD Protection & Thermistor
  • Integral Laser Line Filter
  • SMSR 70 dB w/ laser line filter (40 dB without)

Custom Capabilities

  • Custom wavelengths available upon request
  • FC/PC, FC/APC, or unterminated output coupler
  • Single-mode or Polarization-maintaining fiber available with orientation in either fast or slow axis
  • Integral optical isolator available (Will utilize extended tub BF package.)
  • External TEC (e.g. No TEC inside of package optional)


Wavelength Tolerance

+/- 0.5 nm

Spectral Linewidth (Dl)

~ 100 kHz Typical

Wavelength Stability Range

15 °C - 45 °C


35 - 45 dB

Fiber Options


Polarization Maintaining, Panda Type


>17dB, 20dB Typical

Polarization Orientation

Standard is PM slow.

Output Power Stability

1% Typical


This laser package is designed for OEM Integration and is ideal for:

  • High Resolution Raman Spectroscopy
    • Confocal Microscopy
    • Raman Imaging
    • Portable Raman
    • Process Raman
  • Direct-diode Frequency Doubling
  • Fiber Laser Seeding
  • Metrology & Interferometry
  • Remote Sensing