A 10Gb/s transmitter module containing an electroabsorption modulator monolithically integrated with a distributed feedback (DFB) semiconductor laser is fabricated using the identical epitaxial layer scheme.Gain-coupl...A 10Gb/s transmitter module containing an electroabsorption modulator monolithically integrated with a distributed feedback (DFB) semiconductor laser is fabricated using the identical epitaxial layer scheme.Gain-coupling mechanism is employed to improve the single mode yield of the DFB laser,while inductively coupled plasma dry etching technique is utilized to reduce the modulator capacitance.The integrated device exhibits a threshold current as low as 12mA and an extinction ratio over 15dB at -2V bias.The small signal modulation bandwidth is measured to be over 10GHz.The transmission experiment at 10Gb/s indicates a power penalty less than 1dB at a bit-error-rate of 10 -12 after transmission through 35km single mode fiber.展开更多
Aim of the study: To observe the effect of electroacupuncture (EA) on canine pyloric pressure and its relation with contents of motilin (MTL), somatostatin (SS) and nitric oxide synthetase (NOS) in the gastric mucosal...Aim of the study: To observe the effect of electroacupuncture (EA) on canine pyloric pressure and its relation with contents of motilin (MTL), somatostatin (SS) and nitric oxide synthetase (NOS) in the gastric mucosal tissues. Methods: The total and basic pressure of the pyloric sphincter, and the frequency of the high pressure waves were measured by using a gastrotonometer; and the contents of MTL, SS and NOS in tissues of the gastric body and gastric antrum mucosa were detected by using radioimmunoassay(RIA) and biochemical methods in 20 dogs. Results: After EA of Zusanli (ST 36), the total and basic pressure of the pyloric sphincter, and the frequency of the high pressure waves, the content of SS in the gastric body mucosa, MTL and SS in the gastric antrum mucosa all decreased significantly (P<0.05) and the level of NOS increased clearly (P<0.05). While after EA of Xiajuxu (ST 39), all the indexes had not any striking changes except significant decrease of SS content in the gastric body mucosa (P<0.05). Conclusions: EA has a significant modulating action on gastrointestinal functional activities by lowering canine pyloric pressure and contracted frequency, which is also related with its influence on contents of some brain gut peptides (BGP) and is of specificity in meridians and acupoints.展开更多
文摘A 10Gb/s transmitter module containing an electroabsorption modulator monolithically integrated with a distributed feedback (DFB) semiconductor laser is fabricated using the identical epitaxial layer scheme.Gain-coupling mechanism is employed to improve the single mode yield of the DFB laser,while inductively coupled plasma dry etching technique is utilized to reduce the modulator capacitance.The integrated device exhibits a threshold current as low as 12mA and an extinction ratio over 15dB at -2V bias.The small signal modulation bandwidth is measured to be over 10GHz.The transmission experiment at 10Gb/s indicates a power penalty less than 1dB at a bit-error-rate of 10 -12 after transmission through 35km single mode fiber.
文摘Aim of the study: To observe the effect of electroacupuncture (EA) on canine pyloric pressure and its relation with contents of motilin (MTL), somatostatin (SS) and nitric oxide synthetase (NOS) in the gastric mucosal tissues. Methods: The total and basic pressure of the pyloric sphincter, and the frequency of the high pressure waves were measured by using a gastrotonometer; and the contents of MTL, SS and NOS in tissues of the gastric body and gastric antrum mucosa were detected by using radioimmunoassay(RIA) and biochemical methods in 20 dogs. Results: After EA of Zusanli (ST 36), the total and basic pressure of the pyloric sphincter, and the frequency of the high pressure waves, the content of SS in the gastric body mucosa, MTL and SS in the gastric antrum mucosa all decreased significantly (P<0.05) and the level of NOS increased clearly (P<0.05). While after EA of Xiajuxu (ST 39), all the indexes had not any striking changes except significant decrease of SS content in the gastric body mucosa (P<0.05). Conclusions: EA has a significant modulating action on gastrointestinal functional activities by lowering canine pyloric pressure and contracted frequency, which is also related with its influence on contents of some brain gut peptides (BGP) and is of specificity in meridians and acupoints.
