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  • DFB Butterfly Laser Module
Apr 2011
QD Laser Inc., Laser Device Div.Request Info
KANAGAWA, Japan, April 4, 2011 — QD Laser Inc. has introduced the QLD1061, a single-mode distributed feedback (DFB) laser diode emitting in the near-infrared wavelength band around 1064 nm.

The RoHS-compliant device offers strong fiber output power of >30 mW with a stable spectral single mode and a narrow linewidth of <10 MHz. The 14-pin butterfly laser module includes an optical isolator, a monitor photodiode and a thermoelectric cooler and is pigtailed with a polarization-maintaining fiber. It can be used for continuous-wave and pulsed applications such as injection seeding for fiber amplifiers or lasers, sensing, light detection and ranging, and frequency doubling.

Forward current is 250 mA, reverse voltage is 2 V, thermoelectric drive current is 2 A, and thermoelectric drive voltage is 4.3 V. Operating temperature is from 0 to 60 °C. Typical spectral width is 4 MHz FWHM, with a maximum of 20 MHz. Side mode suppression ratio is 40 dB, and polarization extinction ratio is 20 dB.


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frequency doubling
A nonlinear optical process in which the frequency of an optical beam is doubled coherently.
injection seeding
The use of a small ultrastable master oscillator (a diode-pumped Nd:YAG laser) to achieve single-frequency operation of a large pulsed Nd:YAG host laser, providing improved bandwidth and temporal profile.
optical isolator
Also known as an optical diode, an optical isolator is a device that utilizes the Faraday effect to suppress or redirect backscattered or backreflected light in order to allow light transmission in one direction only. Optical isolators are commonly found in laser cavities.
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