Turghun Matniyaz

Corning Incorporated | Corning

There have been several demonstrations of single-frequency single-mode ytterbium-doped fiber lasers operating at a few hundred watts of power. A narrow spectral linewidth of these lasers is critical for many applications but has never been properly measured before at high powers. In this work, we report the first spectral linewidth measurement at k...

Further power scaling of narrow-linewidth fiber lasers is critical for beam combining. Using all-solid photonic bandgap fibers with large effective mode areas and strong higher-order-mode suppression is an interesting approach. Previously, we demonstrated ${\sim}{400}\;{\rm W}$ ∼ 400 W single-frequency single-mode power at 1064 nm from a 50/400 pho...

Using an ytterbium-doped fiber with a 50 μm core and 0.028 NA, a pulse energy of 4.8 mJ was achieved directly from a single-mode Q-switched fiber laser. The repetition rate was 10 kHz and the average power was 48.4 W. The slope efficiencies with regard to the absorbed and launched pump power were ∼74% and ∼59% respectively. The pulse width decrease...

Power scaling of rare-earth-doped fiber lasers is vital to many emerging applications. Average output power scaling with Yb doped fiber lasers operating near 1.1 μm was very successful in the 10 years between 2000 and 2010. The discovery and rediscovery of many limiting factors such as nonlinear effects, thermal lensing, optical damage, and so fort...

We demonstrate a double-cladding Er/Yb fiber MOPA counter-pumped by 915nm pump diode, which produces a record-high output of 302W diffraction-limited power at 1562nm with an optical efficiency of 56% and average M 2 ~1.04.

This publisher’s note contains corrections to Opt. Lett. 45, 2910 (2020).OPLEDP0146-959210.1364/OL.392786

Conventional models of Er/Yb co-doped fibers assume all ytterbium ions are equally involved in the energy transfer with erbium ions, governed by a singular transfer rate. This would predict output power clamping once ytterbium parasitic lasing starts, contrary to the observations that the output continued to grow albeit at a slower rate. One study...

There has been very little progress in the power scaling of Er/Yb fiber lasers in over a decade, reflecting the difficulties involved. Here we report, to the best of our knowledge, a new record of 302 W single-mode power from an Er/Yb fiber master oscillator power amplifier (MOPA) with a record optical efficiency of 56%, near the quantum limit. Thi...

We demonstrate that the strong 4-level Yb emission in a fiber laser can be almost completely suppressed in an Yb all-solid double-clad photonic bandgap fiber, resulting in highly efficient high-power monolithic Yb fiber lasers operating at the 3-level system. We have achieved single-mode continuous wave laser output power of ~151W at ~978nm with an...

Efficient cladding-pumped three-level Yb fiber lasers are difficult to achieve due to the competing four-level system and necessary high inversions. We demonstrate an efficiency of ∼ 62.7 % versus a coupled pump, a record for cladding-pumped fiber lasers with a single-pass pump. 84 W at ∼ 978 nm with ∼ 1.12 M 2 was achieved, a record power for flex...

We report record single-mode power of ~150W and record single-pass-pump efficient of ~63% versus the launched pump power from a monolithic Yb three-level fiber laser at ~978nm based on an all-solid photonic bandgap fiber.

We demonstrated highly efficient 976nm single-mode fiber lasers using all-solid photonic bandgap fibers which was designed to suppress the 4-level system in Yb lasers with high transmission loss. We achieved efficiency of ~54% with respect to the launched pump power and M 2 of ~1.2 with a potentially monolithic approach.

We have specifically investigated the free-space mode locking dynamics of erbium-doped fiber (EDF) mode-locked ultrafast lasers via nonlinear polarization rotation (NPR) in the normal dispersion regime. To do so, we built a passively mode-locked fiber laser based on NPR with a repetition rate of 89 MHz producing an octave-spanning spectrum due to s...

We achieved 27.8W from a single-mode Yb-doped all-solid photonic bandgap fiber laser with slope efficiencies of 36.3% and 75.6% with respect to launched and absorbed pump powers respectively, setting new records for coiled fiber lasers.

This thesis reports our attempt towards achieving a phase stabilized free-space nonlinear polarization rotation (NPR) mode locked erbium doped fiber laser frequency comb system. Optical frequency combs generated by mode-locked femtosecond fiber lasers are vital tools for ultra-precision frequency metrology and molecular spectroscopy. However, the c...

Nonlinear Polarization Rotation, Mode-locking, Tm-doped fiber laser, Optical Frequency Comb

Optical frequency combs produced by mode-locked femtosecond fiber lasers are vital tools for high precision frequency metrology and molecular spectroscopy in a robust and portable format. We have specifically investigated erbium-doped fiber (EDF) mode-locked ultrafast lasers via nonlinear polarization rotation (NPR) in the normal dispersion regime....