1,722,946 research outputs found
Dataset for: Controllable duration and repetition-rate picosecond pulses from a high-average-power OP-GaAs OPO
No full textThis dataset supports the publication: Fu, Qiang et al (2020) Controllable duration and repetition-rate picosecond pulses from a high-average-power OP-GaAs OPO. Optics Express.</span
Dataset for Widely tunable, narrow-linewidth, high-peak-power, picosecond mid-infrared optical parametric amplifier
No full textDataset supports:
Fu, Qiang et al. (2018) Widely tunable, narrow-linewidth, high-peak-power, picosecond mid-infrared optical parametric amplifier. IEEE Journal of Selected Topics in Quantum Electronics</span
Mid-infrared pulse generation via Orientation Patterned Gallium Arsenide Parametric Devices
No full textMid-infrared (mid-IR) pulsed lasers are finding increasing applications in the areas of industrial processing, spectroscopy, medicine, and chemistry due to the presence of characteristic vibrational absorptions of a large number of molecules in this spectral region. Optical parametric devices (OPDs), as one of the most promising solutions for mid-infrared generation, have attracted much attention. Nonlinear crystals are key elements for OPDs and the recently developed material system, orientation-patterned gallium arsenide (OP-GaAs), is deemed as an outstanding nonlinear gain element for the mid-IR spectral region. This thesis describes a systematic study of the development of mid-IR OPDs based on OP-GaAs, including optical parametric generators (OPGs), amplifiers (OPAs), oscillators (OPOs) and their variants. Several 2-µm, picosecond, thulium-doped-fibre master oscillator power amplifier (Tm:MOPA) systems, employing gain-switched laser diode seeding, are developed as the pump source for the OP-GaAs OPDs, greatly increasing their flexibility and potential for real-world applications. In a simple single-pass configuration, an OP-GaAs OPG is pumped by a high-peak-power, lowrepetition rate (1 MHz) Tm:MOPA, and provides a wide wavelength tuning range of 2550-2940 nm (signal) and 5800-8300 nm (idler) as well as a high peak power of 2.8 kW (signal) and 1.7 kW (idler). The OPG naturally generates an output with a broad spectral linewidth. In order to control and narrow the spectral linewidth, a wavelength-tunable Cr:ZnSe laser is employed as a seed laser to change the OPG into an OPA. Compared to the OPG, the OPA offers a lower pump power requirement and higher conversion efficiency. The OPA signal and idler spectral linewidth is narrowed to 0.7 cm-1 and 1.4 cm-1, respectively, and a maximum output peak power of 11.4 kW and 2.8 kW for signal and idler is obtained. However, the OPA requires an external seed laser and therefore its tuning range is mainly limited by that of the seed laser. To overcome the tuning limitation, a novel cascaded OPG-OPA is proposed and developed that combines the good features of the OPG and OPA. In the cascaded OPG-OPA, the OPG output signal spectrum is controlled and filtered and then used as the seed source for the OPA. Without using an external seed laser, a tuning range of 2552-2960 nm (signal) and 5733-8305 nm (idler) covering the entire wavelength regime that the OP-GaAs gratings provided is demonstrated, and controlled output signal and idler linewidths of 1.4 cm-1 and 9 cm-1 are achieved, respectively. The mid-IR output beam of OPGs and OPAs are typically not diffraction limited due to the lack of any active spatial control. In contrast, OPOs with cavity structures, can offer mid-IR output at high beam qualities. An idler-resonant OP-GaAs OPO, synchronously pumped by another Tm:MOPA system operating at a high repetition rate of 100 MHz, is demonstrated and delivers a neardiffraction-limited output beam for the mid-IR idler. Power scaling of the OP-GaAs OPO is then investigated, pumped by a high-average-power Tm:MOPA, and a total mid-IR maximum output power of 9.7 W is obtained with wide wavelength tunablity (2.9-3.3 μm for signal, 4.9-6.4 μm for idler). The output characteristic shows a thermal roll-over which is cured in the final work section via active water-cooling of the OP-GaAs crystal. The final work also demonstrates the flexibility allowed by the gain-switched-diode seeding of the pump laser, delivering a controllable pulse repetition-rate (100 MHz – 1 GHz) and duration (95 ps – 1.1 ns) OPO with a maximum total output power of 13.7 W at a signal and idler wavelength of 3.3 μm and 4.9 μm, respectively
Scirpophaga adunctella Chen
No full textScirpophaga adunctella Chen, Song & Wu, 2006 (Figs 38, 45, 53) Scirpophaga adunctella Chen, Song & Wu, 2006. Zootaxa, 1236: 15. Type locality: China, Yunnan. Description. Wing span ♀ 30–38 mm. Female white, anal tuft pale ochreous; others same to male. Both male and female sometimes have a dark fuscous spot present at the lower angle of cell on forewing. Female genitalia. Anal papillae broad, covered with long setae; apophyses anterioris and posterioris well developed and with the same length; ostium bursae broad and long, strongly wrinkled, sclerotized towards ductus bursae, different with other species; ductus bursae membranous; corpus bursae round, lined with dense spines. Material examined. IZCAS: Holotype ♂, Yunnan, Wanding, 820 m, 29 May 1979. Others. Xizang, Mêdog, 1♂, 1 080 m, 23 August 2006, Fu-Qiang Chen; Xizang, Mêdog, Ma’niweng, 1♀, 930 m, 25 August 1974, Fu-Sheng Huang; Xizang, Mêdog, Ma’niweng, 895 m, 1♀, 14 August 2006, Fu-Qiang Chen; Xizang, Mêdog, Hanmi, 2 120 m, 1♀, 10 August 2006, Fu-Qiang Chen; Xizang, Mêdog, Didong, 840 m, 3♀, 16 August 2006, Fu-Qiang Chen. Distribution. China (Yunnan, Xizang). Remarks. The female of this species is firstly reported here. Chen et al. (2006) reported the species according to a single male specimen. At that time, we could not match the right female with the male, although some possible materials were checked. Later, more materials of the species were gotten from Xizang. The materials from Xizang sometimes have a dark fuscous spot present at the lower angle of cell on forewing, which is common in excerptalis group.Published as part of Chen, Fu-Qiang & Wu, Chun-Sheng, 2014, Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China, pp. 163-208 in Zoological Systematics 39 (2) on page 175, DOI: 10.11865/zs20140201, http://zenodo.org/record/461732
High-average-power, mid-infrared, widely tunable, picosecond optical parametric oscillator based on OP-GaAs
No full textThis paper reports a high-average-power mid-infrared source based on an orientation-patterned gallium arsenide (OP-GaAs) optical parametric oscillator (OPO) with wide wavelength tunability. An average power of 4.8 W of signal (3093 nm) and 3.5 W of idler (5598 nm) was achieved at a pump power of 25.5 W. Tuning ranges of 2895 nm-3342 nm (signal) and 4935 nm-6389 nm (idler) were obtained. The idler-resonant OPO offered good beam quality of the mid-infrared idler waves with an M2 of 1.1. High-average-power induced thermal effects for the OP-GaAs OPO were observed
Figs 1–6. Venations. 1. Scirpophaga. 2. Schoenobius. 3. Donacaula. 4. Catagela. 5. Niphadoses. 6 in Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China
No full textFigs 1–6. Venations. 1. Scirpophaga. 2. Schoenobius. 3. Donacaula. 4. Catagela. 5. Niphadoses. 6. Patissa.Published as part of Chen, Fu-Qiang & Wu, Chun-Sheng, 2014, Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China, pp. 163-208 in Zoological Systematics 39 (2) on page 166, DOI: 10.11865/zs20140201, http://zenodo.org/record/461732
Ramila acciusalis Walker 1859
No full text<i>Ramila acciusalis</i> Walker, 1859 (Figs 93, 96, 107) <p> <i>Ramila acciusalis</i> Walker, 1859. <i>List Specimens Lipid. Insects Colln Br. Mus.</i>, 19: 977; Wang, 1980. <i>Economic Insect Fauna of China</i>, 21: 55. Type locality: Borneo.</p> <p>Description. Body silvery white. Labial palpi about 2 times as long as the diameter of compound eyes. Forewing with costa orange. In male genitalia, uncus with apex round; subteguminal process pointed; valva with apex round; juxta elongated, widened from base to apex, apex curved medially; aedeagus strong, two spinose areas and two triangular pointed sclerotized plates present at apex. In female genitalia, a spinose area present at corpus bursae.</p> <p>Material examined. Jiangxi, Mt. Jiulian, 1♀, 28 May 1977, You-Qiao Liu; Fujian, Huangkeng, 1♂, 8♀, 30 June–5 July 1973, Bao-Lin Zhang; Hainan, Qiongzhong, Maodan, 1♀, 7 July 1984; Hainan, Xinglong, 1♂, date absent, Bao-Lin Zhang; Yunnan, Jingdong, 1 170 m, 3♂, 6 May–4 July 1956; Yunnan, Xishuangbanna, Meng’a, 1 050–1 080 m, 2♂, 1♀, 15–17 August 1958, Shu-Yong Wang, Fu-Ji Pu; Yunnan, Xishuangbanna, Menglong, 650 m, 1♀, 7 August 1958, Yi-Ran Zhang; Yunnan, Xishuangbanna, Menglun, 650 m, 1♂, 1♀, 27 May–31 July 1964, Bao-Lin Zhang; Yunnan, Cangyuan, 2♂, 1♀, 21 May 1980, Shi-Mei Song; Yunnan, Jinping, Hetouzhai, 1700 m, 9–13 May 1956, Ke-Ren Huang; Yunnan, Hekou, Xiaonanxi, 200 m, 2♂, 11 June 1956, Ke-Ren Huang; Xizang, Mêdog, Aniqiao, 1080 m, 4♂, 1♀, 12 August 2006, Fu-Qiang Chen; Xizang, Mêdog, Maniweng, 895 m, 1♂, 14 August 2006, Fu-Qiang Chen; Xizang, Mêdog, Didong, 840 m, 3♂, 4♀, 16 August 2006, Fu-Qiang Chen; Xizang, Mêdog, Beibeng, 786 m, 2♂, 3♀, 18 August 2006, Fu-Qiang Chen; Xizang, Mêdog, 1 080 m, 2♂, 2♀, 23 August 2006, Fu-Qiang Chen.</p> <p> © <i>Zoological Systematics</i>, 39 (2): 163–208</p> <p>Distribution. China (Jiangxi, Fujian, Hainan, Yunnan, Xizang); India, Sri Lanka, Malaysia.</p>Published as part of <i>Chen, Fu-Qiang & Wu, Chun-Sheng, 2014, Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China, pp. 163-208 in Zoological Systematics 39 (2)</i> on pages 194-195, DOI: 10.11865/zs20140201, <a href="http://zenodo.org/record/4617322">http://zenodo.org/record/4617322</a>
Leechia sinuosalis South 1901
No full textLeechia sinuosalis South, 1901 (Figs 113, 123) Leechia sinuosalis South, 1901. In: Leech, Trans. Ent. Soc. Lond., 1901: 400. Type locality: China, Hubei, Changyang. Leechia formosensis Wileman & South, 1918. Entomologist, 3: 218. Type locality: Taiwan, China. Description. Labial palpi porrect, slender and white, outer side mixed with fuscous scales. Forewing with postmedial line outwardly oblique to vein M 1, inwardly oblique to Cu 2, thence outwardly oblique to inner margin. Hindwing with double fuscous medial lines present, blurry and short. In male genitalia, uncus triangular, dorsal suffused with dense setae; gnathos absent; valva short; juxta weakly sclerotized, plate-like; coremata absent; aedeagus slender, several spine-like cornuti present at apex. Material examined. IZCAS: Shaanxi, Ningshan, Huoditang, 1580 m, 1♂, 27 July 1998, Jian Yao; Gansu, Dangchang, Dahebagou, 1 700 m, 2♂, 9 July 1998, Xue-Zhong Zhang; Gansu, Wenxian, Liujiaping, 800 m, 1♂, 27 June 1998, De-Cheng Yuan; Anhui, Xuancheng, Laodongdaxue, 1♂, 18 August 1975; Jiangxi, Dayu, 1♂, 17 August 1985, Shi-Mei Song; Hunan, Yanling, Taoyuandong, 631 m, 3♂, 7♀, 4–8 July 2008, Fu-Qiang Chen; Fujian, Da’an, 1♂, 19 June 1981, Shi-Cheng Qi; Fujian, Mt. Wuyi, 1♂, 26 June 1982, Jiang Fan; Fujian, Sangang, 1♂, 17 August 1979; Fujian, Mt. Wuyi, Mali, 1260 m, 1♀, 30 July 2000, Shi-Mei Song; Guangdong, Nanling, 865 m, 1♂, 1♀, 15 July 2005, Fu-Qiang Chen; Sichuan, Xichang, 2♂, 31 July 1980, Bao-Lin Zhang. © Zoological Systematics, 39 (2): 163–208 Distribution. China (Shaanxi, Gansu, Anhui, Hubei, Jiangxi, Hunan, Fujian, Taiwan, Guangdong, Sichuan); Japan.Published as part of Chen, Fu-Qiang & Wu, Chun-Sheng, 2014, Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China, pp. 163-208 in Zoological Systematics 39 (2) on pages 201-202, DOI: 10.11865/zs20140201, http://zenodo.org/record/461732
FIGURE 3. A in Garra findolabium, a new species of cyprinid fish (Teleostei: Cypriniformes) from the Red River drainage in Yunnan, China
No full textFIGURE 3. A map showing the distribution of Garra findolabium in Yunnan (indicated by solid triangle)Published as part of Li, Feng-Lian, Zhou, Wei & Fu, Qiang, 2008, Garra findolabium, a new species of cyprinid fish (Teleostei: Cypriniformes) from the Red River drainage in Yunnan, China, pp. 62-68 in Zootaxa 1743 on page 67, DOI: 10.5281/zenodo.18160
Figs 87–94. Adults. 87. Niphadoses dengcaolites, male. 88. N. dengcaolites, female. 89. Patissa fulvosparsa. 90. P. minima. 91. Patissa tenuousa. 92. Ramila marginella. 93. R. acciusalis. 94. R in Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China
No full textFigs 87–94. Adults. 87. Niphadoses dengcaolites, male. 88. N. dengcaolites, female. 89. Patissa fulvosparsa. 90. P. minima. 91. Patissa tenuousa. 92. Ramila marginella. 93. R. acciusalis. 94. R. minima sp.nov.Published as part of Chen, Fu-Qiang & Wu, Chun-Sheng, 2014, Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China, pp. 163-208 in Zoological Systematics 39 (2) on page 193, DOI: 10.11865/zs20140201, http://zenodo.org/record/461732
- …
