SU502651A1 - Method for heat treatment of lithium metaniobate crystals - Google Patents
Method for heat treatment of lithium metaniobate crystalsInfo
- Publication number
- SU502651A1 SU502651A1 SU1988663A SU1988663A SU502651A1 SU 502651 A1 SU502651 A1 SU 502651A1 SU 1988663 A SU1988663 A SU 1988663A SU 1988663 A SU1988663 A SU 1988663A SU 502651 A1 SU502651 A1 SU 502651A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- heat treatment
- crystals
- electric field
- degrees
- lithium
- Prior art date
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- Crystals, And After-Treatments Of Crystals (AREA)
Description
1one
Изобретение относитс к способу термообработки кристаллов метаниобата лити , широко примен емых в квантовой элект..The invention relates to a method for heat treatment of lithium methaniobate crystals, widely used in quantum electronics.
Известен способ термообработки кристаллов метаниобата лити , включающий нагрев, выдержку в посто нном электрическом поле и охлаждение. Однако электрооптические модул торы , в которых используютс кристаллы метаниобата лити , полученные известным способом, имеют ухудшенные динамические характеристики.There is a known method for heat treatment of lithium methaniobate crystals, which includes heating, holding in a constant electric field and cooling. However, electro-optical modulators that use lithium metathiobate crystals obtained in a known manner have degraded dynamic characteristics.
С целью улучшени динамических характеристик модул торов выдержку кристаллов провод т при 225-235°С в течение 10-30 мин при напр женности электрического пол 1960-2040 В/см. Преимуш,ественно подъем температуры провод т со скоростью 150- 200 град/ч, а снижение температуры после термообработки провод т со скоростью 50- 100 град/ч.In order to improve the dynamic characteristics of the modulators, the exposure of the crystals is carried out at 225-235 ° C for 10-30 minutes with an electric field strength of 1960-2040 V / cm. Advantageously, the temperature rise is carried out at a speed of 150-200 degrees / h, and the temperature decrease after heat treatment is carried out at a speed of 50-100 degrees / h.
Пример. Выращенный, отожженный и монодоменизированный по известной технологии кристалл метаниобата лити с размерами 4Х Х5х16 мм, имеющий динамическую характеристику - зависимость (lgf) ( см. линию 1 на чертеже), где М - глубина модул ции, f - частота, при времени коммутации т 5-10 с, подвергают термообработке в присутствии электрического нол . Термообработку провод т в термостатированной печи. Образец помещают в кристаллодержатель из тефлона , диэлектрического материала, выдерживающего сильные электрические пол до 300°С. Подъем температуры осуществл ют в течение 2 ч. до 230°С и выдерживают в электрическом поле 2000 В/см в течение 30 мин, затем охлаждают до комнатной температуры в течение 3 ч.Example. Grown, annealed, and monodomanized by a known technology, a lithium methaniobate crystal with dimensions of 4 × X5x16 mm, having a dynamic characteristic — dependence (lgf) (see line 1 in the drawing), where M is the modulation depth, f is the frequency, with switching time t 5 -10 s, subjected to heat treatment in the presence of an electric zero. Heat treatment is carried out in a thermostatic oven. The sample is placed in a Teflon crystal holder, a dielectric material that can withstand strong electric fields up to 300 ° C. The temperature was raised for 2 hours to 230 ° C and held in an electric field of 2000 V / cm for 30 minutes, then cooled to room temperature for 3 hours.
В результате проведенной термообработки в электрическом поле происходит расширение динамической характеристики (см. линию 2 на чертеже).As a result of the heat treatment carried out in an electric field, the dynamic characteristic is expanded (see line 2 in the drawing).
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1988663A SU502651A1 (en) | 1974-01-21 | 1974-01-21 | Method for heat treatment of lithium metaniobate crystals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1988663A SU502651A1 (en) | 1974-01-21 | 1974-01-21 | Method for heat treatment of lithium metaniobate crystals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU502651A1 true SU502651A1 (en) | 1976-02-15 |
Family
ID=20573427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1988663A SU502651A1 (en) | 1974-01-21 | 1974-01-21 | Method for heat treatment of lithium metaniobate crystals |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU502651A1 (en) |
-
1974
- 1974-01-21 SU SU1988663A patent/SU502651A1/en active
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