Li Wang

Power Scaling of a Narrowband-Seeded, Non-Resonant Optical Parametric Oscillator Based on Periodically Poled LiNbO3

Tugba Temel, S. Jerome Das, G. Spindler, A. Schirrmacher et autres

A periodically poled LiNbO3 (PPLN) non-resonant optical parametric oscillator injectionseeded by narrowband sub-50-mW CW radiation at the signal wavelength produces a >3 W average idler power at 2376 nm for a 20 kHz repetition rate, with a ~2 nm spectral linewidth. Seed …

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Laser heterodyne interferometry nano-displacement measurement based on an electro-optic modulation double sideband

Shuwei Zhang, Xiaoping Qiu, Zhongwen Deng, Wenjun Chen et autres

We propose a novel, to our knowledge, dual-frequency laser heterodyne interferometry nano-displacement measurement method utilizing electro-optic modulation (EOM) to generate double-sideband signals. Unlike conventional dual-frequency laser techniques, the proposed EOM based approach produces strictly symmetric double sidebands with suppressed polarization aliasing errors. …

Power scaling of a non-resonant optical parametric oscillator based on periodically poled LiNbO 3 with spectral narrowing

Tugba Temel, G. Spindler, A. Schirrmacher, Ivan Divliansky et autres

Using a Volume-Bragg-Grating at the signal wavelength in a periodically-poled LiNbO 3 non-resonant optical parametric oscillator we achieve a total average power of 11.35 W at 20 kHz corresponding to a conversion efficiency of 63%. The measured signal and idler bandwidths amount …

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Second-harmonic generation in OP-GaAs 0.75 P 0.25 heteroepitaxially grown from the vapor phase

Li Wang, Shivashankar Vangala, Stefan Popien, Marcus Beutler et autres

Top view of an orientation-patterned GaAs 0.75 P 0.25 sample with a domain width of 62 μm used for second-harmonic generation at 5500 nm, containing only about four quasi-phase matching periods.

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Computer-aided alignment technology for freeform off-axis four-mirror optical systems

He Tian, Zhiguo Li, Li Wang, Yu Lei

Compared to traditional spherical and aspherical surfaces, freeform surfaces offer extensive design freedom, which can be fully utilized to correct and balance asymmetric aberrations, achieving system parameters, structures, and functions that are difficult to realize with conventional optical systems. This has made …

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Chromatic tuning of upconversion emission upon dual infrared wavelength co-excitation in Er3+ doped Ba3Lu4O9 phosphor

Xin Chen, Xuezhu Sha, Li Wang, Jinsu Zhang et autres

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Noncritical, temperature-tuned, narrowband, intracavity-pumped CdSe OPO

Li Wang, Weidong Chen, Youbao Ni, Zhenyou Wang et autres

We report on a cascade nanosecond CdSe optical parametric oscillator with an output energy of 0.54 mJ at 100 Hz, temperature tuning within 9245–9285 nm, and a narrow (∼6 cm−1) spectral width achieved by a volume Bragg grating acting on the first …

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Intracavity-pumped, noncritical CdSe OPO operating at 100 Hz

Li Wang, Weidong Chen, Ivan Divliansky, Valdas Pašiškevičius et autres

Spectral narrowing of the first stage signal wave in a cascade optical parametric oscillator (OPO) using a volume Bragg grating produced narrowband ∼0.6-mJ idler pulses at 9.245 µm from the second stage based on CdSe at a repetition rate of 100 Hz. …

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Photonic generation of dual-band triangular chirps utilizing a monolithic integrated mutual injection laser and application in radars

Shilin Chen, Jin Li, Jilin Zheng, Li Wang et autres

We propose and demonstrate a dual-band microwave photonic radar scheme based on a monolithic integrated mutual injection laser. Based on the photon-photon resonance (PPR) and the gain switching effect of the integrated laser, the C-/X-band triangular chirp signals with high-quality and comparable …

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Eu3+ doped zinc germanate long persistent luminescence phosphor for multi-mode anti-counterfeiting application

Xin Chen, Xuezhu Sha, Yuhang Zhang, Duan Gao et autres

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In-band pumped Kerr-lens mode-locked Tm,Ho-codoped calcium aluminate laser

Huang-Jun Zeng, Wen-Ze Xue, R. Murray, Chen Cui et autres

We report on a Kerr-lens mode-locked Tm,Ho-codoped calcium aluminate laser with in-band pumping of the Tm ions by a spatially single-mode 1678 nm Raman fiber laser. The structurally disordered CaGdAlO 4 host crystal is also codoped also with the passive Lu ion …

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Transmission and nanohardness studies of ternary GaAs1-xPx layers grown from the vapor phase by heteroepitaxy

Valentin Petrov, Li Wang, Ginka Exner, Shivashankar Vangala et autres

Transmission measurements in the 0.5–25-μm spectral range are performed on thin (<350 -μm) GaAsP layers grown by Hydride Vapor Phase Epitaxy (HVPE) on plain (100) GaAs substrates. Comparison with calculations taking into account multiple reflections reveals the role of the surface polishing …

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