The M (miniature) package measures roughly Ø3.2 mm × 25 mm (excluding fiber boots), making it suitable for space-constrained modules. The S (single-stage) design uses a compact YVO₄ or LiNbO₃ birefringent crystal assembly.
The manual states a typical operational lifetime of >10 years under normal use, but degradation accelerates if: js-visg-m-s manual
No field repair is possible – the hermetic package cannot be opened. Replacement is the only option if specifications drift beyond limits. JS-VISG-M-S Manual 3
| Condition | Rating | |-----------|--------| | Operating temperature | –5 °C to +70 °C | | Storage temperature | –40 °C to +85 °C | | Humidity (non-condensing) | 5% – 95% RH | | Tensile load on fiber | Max 5 N (short term) | | Bend radius | ≥30 mm (static), ≥50 mm (dynamic) | Exposed to >70 °C continuously
Critical warning: The manual explicitly forbids epoxy or solvent contact with the optical path. Even vapor from cyanoacrylates can fog the crystal facets.