Datasheet

4. QCL Operation
In this chapter, the general operation principle of a QCL is presented, and its main
characteristics are illustrated using actual plots included in the datasheet provided
with each ALPES LASERS QCL upon delivery.
Contents
4.1. Principle of operation . . . . . . . . . . . . . . . . . . . . . . 42
4.2. ALPES LASERS datasheet . . . . . . . . . . . . . . . . . . . . 43
4.3. QCL spectra . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.3.1. Temperature and current tuning . . . . . . . . . . . . . . . . 44
4.3.2. Linewidth of pulsed single-mode DFB QCLs . . . . . . . . . . 47
4.3.3. Linewidth of CW single-mode DFB QCLs . . . . . . . . . . . 47
4.3.4. Bandwidth of multi-mode FP QCLs . . . . . . . . . . . . . . . 48
4.4. I-V curve and emitted power . . . . . . . . . . . . . . . . . . 48
4.4.1. Maximum operating current . . . . . . . . . . . . . . . . . . . 50
4.4.2. Maximum LDD voltage . . . . . . . . . . . . . . . . . . . . . 51
4.4.3. Other DFB QCL plots . . . . . . . . . . . . . . . . . . . . . . 52
4.5. Beam Properties . . . . . . . . . . . . . . . . . . . . . . . . 53
41