Abstract
The external cavity tunable mid-infrared emitters based on Littrow configuration and utilizing three stages type-I quantum well cascade diode laser gain elements were designed and fabricated. The free-standing coated 7.5-μm-wide ridge waveguide lasers generated more than 30 mW of continuous wave power near 3.25 μm at 20°C when mounted epi-side-up on copper blocks. The external cavity lasers (ECLs) utilized 2-mm-long gain chips with straight ridge design and anti-/neutral-reflection coated facets. The ECLs demonstrated narrow spectrum tunable operation with several milliwatts of output power in spectral region from 3.05 to 3.25 μm corresponding to ∼25 meV of tuning range.
| Original language | English |
|---|---|
| Article number | 011012 |
| Journal | Optical Engineering |
| Volume | 57 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 2018 |
Keywords
- external cavity laser
- GaSb
- mid-infrared
- quantum cascade
- tunable laser
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