- Laser Model: TOPTICA OPO (TOPO)
- Description: A mid-infrared, continuous wave, singly resonant optical parametric oscillator. The OPO system consists of a distributed feedback diode laser (TOPTICA DFB pro BFY) and a fiber amplifier (FA), which produces 10 W of cw light. The output of the FA, referred to as the pump, is centered at λp = 1064 nm and was tunable by ∼ 4 nm (35 cm−1). Two beams are produced as a result of the OPO process, namely, a signal beam, tunable in the range 1450-2070 nm and an idler beam, tunable in the range 2190-4000 nm.
- Applications: The TOPO range is 1.45 - 4.00 μm. Most of combustion species have absorption spectra in that range, whether it is caused by the C-H stretching, C-O stretching, or N-H stretching modes.
- Controlling/tuning method(s): Motor position, crystal position, temperature, etalon angle.
|Wavenumber coverage (cm-1)||2500 - 6900|
|Wavelength coverage (μm)||1.45 - 4|
|Pulse or cw?||cw|
|Maximum tuning speed||2 cm-1/min|
|Maximum power (W)||10|
- TOPO Setup: