Widely and Rapidly Tunable Semiconductor Master-Oscillator Fiber Amplifier Around 1080 nm

Abstract

We describe the wide and rapid wavelength tuning of a continuous-wave master-oscillator power-amplifier system consisting of a semiconductor-amplifier-based oscillator and an ytterbium (Yb)-doped fiber amplifier. The oscillator utilizes an acoustooptic tunable filter and an intracavity etalon to achieve wavelength tuning of 36 nm in 5 ms. The 50-mW output from the master oscillator was amplified to over 9 W in an Yb-doped fiber amplifier.

Fourier domain mode-locked swept source at 1050 nm based on a tapered amplifier

“…Previously, Chi et al used a tapered amplifier in a high-power laser, tunable around 800 nm [21]. Adhimoolam and Groß et al demonstrated wavelength-swept lasers at 1080 nm with sweep rates from 0.1 to 1 kHz based on a tapered amplifier in a free-space ring resonator [22,23]. Here, we present the integration of a tapered amplifier into a fiber-based swept source and prove its feasibility for high-speed FDML operation.…”

Wavelength-swept Yb-fiber master-oscillator-power-amplifier with 70nm rapid tuning range

“…Frequency-swept acquisition of such spectra requires mid-IR parametric sources capable of tuning over hundreds of cm 1 on millisecond timescales with moderate resolution (a few cm 1 ), placing similar requirements on the near-IR pump source, which must also provide the multi-watt output power required to pump, for example, a singly-resonant parametric oscillator well above threshold. Yb-doped fibers have been combined with acousto-optic tunable filters (AOTF) for rapid frequency-swept operation, both as lasers [5] and in a master oscillator power amplifier (MOPA) configuration with a semiconductor master oscillator [6]. However, the demonstrated tuning ranges of 43nm and 36nm, respectively, only partially exploited the Yb gain bandwidth.…”

Diode-oscillator fiber-amplifier systems: versatile, high power spectro-temporal control

“…In this chapter, we report on a laser source operated in a master-oscillator power-amplifier (MOPA) setup, which simultaneously satisfied all the above requirements. The novel master-oscillator consists of a semiconductor amplifier based laser, which is widely and rapidly tunable around a wavelength of 1.08µm, and an Ytterbium-doped fiber as the power-amplifier [116]. The combination of the two results in a source with rapid tuning over tens of nano-meters at multi-Watt power levels.…”