MIRO39

MIRO39 ROITHNER | Alldatasheet

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Optically pumped light emitting diodes (OP LEDs) Specifications (T=24 0C) Type No. MIRO39-xx-xxxxx series Peak wavelength λ μm 3.9±0.1 Spectral FWHM, μm 0.7÷ 0.75 Pulse duration τ ≤10 Pulse conditions: Pulse period T μs ≥1000 Maximum pulse current Ipulse mA 1000 Pulse voltage at I=1000 mA Upulse V 2.1÷2.8 Pulse power at I=1000 mA Ppulse μW 250±40 Maximum CW current (with a heatsink) Icw mA 50 CW voltage at I=50 mA Ucw V 1.30÷1.4 CW power at I=50 mA PCW μW 20±4 dλ/dT nm/K -4.2 dP/dT %/K -(0.6÷0.7) Package House code Lens type Lens material Emission size Angle of view FWHM Storage conditions Operation conditions Polarity mm deg 0C 0C TO18 - ∅ 0.8 ≤140 -25 to +55 -25 to +50 short leg or key is negative TO18 mIL Chalcogenide glass ∅ 1 ≤50 -25 to +50 -25 to +45 the same TO39 - ∅ 0.8 ≤140 -25 to +55 -25 to +50 the same TO39 IL CdSb or Si ∅ 3.5 ≤35 -25 to +50 -25 to +45 the same Type No. MIRO39-140-18s MIRO39-50-18GmL MIRO39-140-39s MIRO39-50-39GmL MIRO39-35-39CL (TO18) (TO18+mIL) (TO39) (TO39+mIL) (TO39+IL) Package photo

Current dependence of the output power (L-I) (24 0C) 0 200 400 600 800 1000 1200 1400 1600 0.0 0.1 0.2 0.3 0.4 o C, f=2 kHz τ=10 μs τ=50 μs τ=250 μs TO39 attached to a heatsink Pulse power (mW) Current (mA) 0 200 400 600 800 1000 0.00 0.05 0.10 0.15 0.20 0.25 o C, f=2 kHz τ=10 μs τ=50 μs τ=250 μs TO39 without a heatsink Pulse power (mW) Current (mA) 0 200 400 600 800 1000 0.00 0.05 0.10 0.15 0.20 0.25 o C, f=2 kHz τ=10 μs τ=50 μs τ=250 μs TO18 attached to a heatsink Pulse power (mW) Current (mA) 0 100 200 300 400 500 600 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 o C, f=2 kHz τ=10 μs τ=50 μs τ=250 μs TO18 without a heatsink Pulse power (mW) Current (mA) Maximal current vs. operation conditions 0.01 0.1 1 708090100 200 300 400 500 600 7008009001000 2000 3000 Duty cycle = τ/T, τ - pulse duration, T - period duration Maximum current, mA Duty cycle TO39 attached to a heatsink TO39 without and TO18 with a heatsink TO18 without a heatsink

Current dependence of the emission spectra(24 0C, f=2kHz, τ=5 μs) 100 mA 500 mA 1000 mA 2000 mA 3000 mA o f=2 kHz, τ=5 μs TO39 attached to a heatsink Intensity (arb.un.) Wavelength (μm) 0.0 0.5 1.0 CO2 absorption 100 mA 1000 mA 3000 mA TO39 attached to a heatsink Wavelength (μm) Normalized intensity 0.0 0.5 1.0 1.5 2.0 100 mA 500 mA 1000 mA 2000 mA o f=2 kHz, τ=5 μs TO39 without a heatsink Intensity (arb.un.) Wavelength (μm) 0.0 0.5 1.0 100 mA 1000 mA 2000 mA TO39 without a heatsink Wavelength (μm) Normalized intensity Normalized emission spectra at maximal current(24 0C) 0.0 0.5 1.0 o f=2 kHz, τ=50 μs I=1000 mA TO39 attached to a heatsink Normalized intensity Wavelength (μm) 0.0 0.5 1.0 CO2 absorptionTO39 attached to a heatsink o f=2 kHz, τ=250 μs I=250 mA Wavelength (μm) Normalized intensity 0.0 0.5 1.0 o f=2 kHz, τ=50 μs I=500 mA TO39 without a heatsink Normalized intensity Wavelength (μm) 0.0 0.5 1.0 o f=2 kHz, τ=250 μs I=150 mA TO39 without a heatsink Wavelength (μm) Normalized intensity

Emission spectra and output power vs. temperature - 2 0 - 1 00 1 02 03 04 05 0 0.8 0.9 1.0 1.1 1.2 1.3 1.4 - 2 0 - 1 00 1 02 03 04 05 0 3.8 3.9 4.0 4.1 4.2Peak wavelength (μm) Temperature (C) Power at fix. current Temperature (C) Current-voltage (I-V) characteristics 500 1000 1500 2000 2500 3000 100 200 300 400 500Current (mA) Voltage (V) Current (mA) Voltage (V) Far-field pattern -90 -60 -30 0 30 60 90 0.0 0.5 1.0 -90 -60 -30 0 30 60 90 0.0 0.5 1.0 -90 -60 -30 0 30 60 90 0.0 0.2 0.4 0.6 0.8 1.0 Lens type: IL FWHM=34 deg. Intensity, arb. units Angle, deg. Lens type: miL FWHM=50 deg Angle, deg. No lens FWHM=140 deg Angle, deg.

Microimmersion lenses (mIL) are made from chalcogenide glass with low melting temperature (60-70 oC). That’s why, please, try to install them vertically, pay attention to heasinking conditions and avoid any heaters close to the miL-LEDs. Maximum operating current is defined as that producing Δt=10-20 K overheating of the p-n junction relative to a heatsink temperature. We recommend not exceeding 0.75×Imax for long term operating devices. In certain applications it’s important to know that in addition to mid-IR radiation most optically pumped LEDs emit NIR pumping radiation λ≅0.87 μm as well (see graph on the right). This “parasitic” emission can be cut off by filters or by a detector window, e.g. by CdSb lens in TO-39 packed LEDs. 0.80 0.85 0.90 0.95 0.0 0.5 1.0 Intensity (arb.un.) Wavelength (μm) Don’t touch the chip, connecting wires and miL surface. Answers to frequently asked questions Q: What are the advantages of the IL and mIL package? A: OP LEDs with immersion lenses emit radiation within small spatial angle, so it is easier to get a signal at some distance from the LED. Q: What is the main difference between LEDs with microimmersion lens (mIL) and LEDs with immersion lens (IL)? A: miL LEDs are brighter/smaller than the L-equipped LEDs and thus standard detectors with 1 ×1 mm2 area can be used (spherical mirror or close “face-to-face” schemes). However, IL LEDs are more stable than the mil LEDs with respect to heating and high drive currents.